diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.ABox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.ABox.inx
index 2eb3df3..a106c50 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.ABox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.ABox.inx
@@ -19,7 +19,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -27,8 +27,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.AgricolaInsert.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.AgricolaInsert.inx
index 5af6098..d693560 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.AgricolaInsert.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.AgricolaInsert.inx
@@ -8,7 +8,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -16,8 +16,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.AirPurifier.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.AirPurifier.inx
index 18883e2..578f03c 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.AirPurifier.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.AirPurifier.inx
@@ -6,7 +6,7 @@
 <param name="tab" type="notebook"><page name="tab_0" gui-text="AirPurifier"><param name="x" type="float" precision="2" max="9999" gui-text="x" gui-description="inner width in mm">498.0</param>
 <param name="y" type="float" precision="2" max="9999" gui-text="y" gui-description="inner depth in mm">496.0</param>
 <param name="filter_height" type="float" precision="2" max="9999" gui-text="filter_height" gui-description="height of the filter along the flow direction (in mm)">46.77</param>
-<param name="rim" type="float" precision="2" max="9999" gui-text="rim" gui-description="rim around the filter holing it in place (in mm)">30.0</param>
+<param name="rim" type="float" precision="2" max="9999" gui-text="rim" gui-description="rim around the filter holding it in place (in mm)">30.0</param>
 <param name="fan_diameter" type="optiongroup" appearance="combo" gui-text="fan_diameter" gui-description="diameter of the fans (in mm)">
 <option value="40.0">40.0</option>
 <option value="60.0">60.0</option>
@@ -31,7 +31,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -39,8 +39,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.AllEdges.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.AllEdges.inx
index 44c7787..4789695 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.AllEdges.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.AllEdges.inx
@@ -10,7 +10,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -18,8 +18,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -51,8 +50,7 @@
 <param name="Hinge_grip_length" type="int" max="9999" gui-text="grip_length" gui-description="fixed length of the grips on he lids (multiples of thickness)">0</param>
 <param name="Hinge_hingestrength" type="int" max="9999" gui-text="hingestrength" gui-description="thickness of the arc holding the pin in place (multiples of thickness)">1</param>
 </page>
-<page name="tab_5" gui-text="Slide-on Lids"><param name="SlideOnLid_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="SlideOnLid_hole_width" type="int" max="9999" gui-text="hole_width" gui-description='width of the "finger hole" in mm'>0</param>
+<page name="tab_5" gui-text="Slide-on Lids"><param name="SlideOnLid_hole_width" type="int" max="9999" gui-text="hole_width" gui-description='width of the "finger hole" in mm'>0</param>
 <param name="SlideOnLid_second_pin" type="bool" gui-text="second_pin" gui-description="additional pin for better positioning">true</param>
 <param name="SlideOnLid_spring" type="optiongroup" appearance="combo" gui-text="spring" gui-description="position(s) of the extra locking springs in the lid">
 <option value="both">both</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.AngledBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.AngledBox.inx
index 85400a9..ba41541 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.AngledBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.AngledBox.inx
@@ -26,7 +26,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -34,8 +34,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.AngledCutJig.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.AngledCutJig.inx
index 6b1102b..5d98766 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.AngledCutJig.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.AngledCutJig.inx
@@ -12,7 +12,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -20,8 +20,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Arcade.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Arcade.inx
index 78ed0a9..94131d6 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Arcade.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Arcade.inx
@@ -12,7 +12,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -20,8 +20,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Atreus21.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Atreus21.inx
index d623913..831cc21 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Atreus21.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Atreus21.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.BasedBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.BasedBox.inx
index 9f16bef..54b3977 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.BasedBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.BasedBox.inx
@@ -13,7 +13,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -21,8 +21,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.BayonetBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.BayonetBox.inx
index 7e47c6a..f63349a 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.BayonetBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.BayonetBox.inx
@@ -13,7 +13,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.BinTray.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.BinTray.inx
index 3a3aa45..250582e 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.BinTray.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.BinTray.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -23,8 +23,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.BirdHouse.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.BirdHouse.inx
index b9290b5..0836f1b 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.BirdHouse.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.BirdHouse.inx
@@ -13,7 +13,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -21,8 +21,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.BookHolder.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.BookHolder.inx
new file mode 100644
index 0000000..5845f07
--- /dev/null
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.BookHolder.inx
@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+<name>BookHolder</name>
+<id>info.festi.boxes.py.BookHolder</id>
+<param name="generator" type="string" gui-hidden="true">bookholder</param>
+<param name="tab" type="notebook"><page name="tab_0" gui-text="BookHolder"><param name="book_width" type="float" precision="2" max="9999" gui-text="book_width" gui-description="total width of book stand">297.0</param>
+<param name="book_height" type="float" precision="2" max="9999" gui-text="book_height" gui-description="height of the front plate">210.0</param>
+<param name="book_depth" type="float" precision="2" max="9999" gui-text="book_depth" gui-description="larger sizes for books with more pages">40.0</param>
+<param name="ledge_height" type="float" precision="2" max="9999" gui-text="ledge_height" gui-description="part in front to hold the book open (0 to turn off)">0.0</param>
+<param name="angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="degrees between floor and front plate">75.0</param>
+<param name="bottom_support" type="float" precision="2" max="9999" gui-text="bottom_support" gui-description="extra material on bottom to raise book up">20.0</param>
+<param name="back_support" type="float" precision="2" max="9999" gui-text="back_support" gui-description="height of additional support in the back (0 to turn off)">50.0</param>
+<param name="radius" type="float" precision="2" max="9999" gui-text="radius" gui-description="radius at the sharp corners (negative for radius=thickness)">-1.0</param>
+</page>
+<page name="tab_1" gui-text="Default"><param name="thickness" type="float" precision="2" max="9999" gui-text="thickness" gui-description="thickness of the material (in mm) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#thickness)">3.0</param>
+<param name="tabs" type="float" precision="2" max="9999" gui-text="tabs" gui-description="width of tabs holding the parts in place (in mm)(not supported everywhere) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#tabs)">0.0</param>
+<param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
+<param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
+<param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
+<param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
+<option value="loop">loop</option>
+<option value="corner">corner</option>
+<option value="backarc">backarc</option>
+    </param>
+<param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
+</page>
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<option value="rectangular">rectangular</option>
+<option value="springs">springs</option>
+<option value="barbs">barbs</option>
+<option value="snap">snap</option>
+    </param>
+<param name="FingerJoint_surroundingspaces" type="float" precision="2" max="9999" gui-text="surroundingspaces" gui-description="space at the start and end in multiple of normal spaces">2.0</param>
+<param name="FingerJoint_bottom_lip" type="float" precision="2" max="9999" gui-text="bottom_lip" gui-description="height of the bottom lips sticking out  (multiples of thickness) FingerHoleEdge only!">0.0</param>
+<param name="FingerJoint_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
+<param name="FingerJoint_extra_length" type="float" precision="2" max="9999" gui-text="extra_length" gui-description="extra material to grind away burn marks (multiples of thickness)">0.0</param>
+<param name="FingerJoint_finger" type="float" precision="2" max="9999" gui-text="finger" gui-description="width of the fingers (multiples of thickness)">2.0</param>
+<param name="FingerJoint_play" type="float" precision="2" max="9999" gui-text="play" gui-description="extra space to allow finger move in and out (multiples of thickness)">0.0</param>
+<param name="FingerJoint_space" type="float" precision="2" max="9999" gui-text="space" gui-description="space between fingers (multiples of thickness)">2.0</param>
+<param name="FingerJoint_width" type="float" precision="2" max="9999" gui-text="width" gui-description="width of finger holes (multiples of thickness)">1.0</param>
+</page>
+<page name="tab_3" gui-text="Example">
+<image>./BookHolder-thumb.jpg</image>
+</page>
+</param>
+<label appearance="url">https://www.festi.info/boxes.py/BookHolder</label>
+<effect>
+    <object-type>all</object-type>
+    <effects-menu>
+        <submenu name="FabLab Chemnitz Boxes.py">
+            <submenu name="Misc"/>
+        </submenu>
+    </effects-menu>
+</effect>
+<script>
+    <command location="inx" interpreter="python">boxes_proxy.py</command>
+</script>
+</inkscape-extension>
\ No newline at end of file
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.BottleStack.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.BottleStack.inx
index 8642c79..db082c1 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.BottleStack.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.BottleStack.inx
@@ -13,7 +13,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.BottleTag.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.BottleTag.inx
index ebcedfd..d9435b3 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.BottleTag.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.BottleTag.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.BreadBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.BreadBox.inx
index c1736b7..fd553d3 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.BreadBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.BreadBox.inx
@@ -13,7 +13,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -21,8 +21,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.BrickSorter.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.BrickSorter.inx
new file mode 100644
index 0000000..8a2b179
--- /dev/null
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.BrickSorter.inx
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+<name>BrickSorter</name>
+<id>info.festi.boxes.py.BrickSorter</id>
+<param name="generator" type="string" gui-hidden="true">bricksorter</param>
+<param name="tab" type="notebook"><page name="tab_0" gui-text="BrickSorter"><param name="x" type="float" precision="2" max="9999" gui-text="x" gui-description="outer width of the most outer layer">256</param>
+<param name="y" type="float" precision="2" max="9999" gui-text="y" gui-description="outer width of the most outer layer">256</param>
+<param name="h" type="float" precision="2" max="9999" gui-text="h" gui-description="inner height in mm">120</param>
+<param name="level" type="optiongroup" appearance="combo" gui-text="level" gui-description="Level of the nestable sieve">
+<option value="large_sieve">large_sieve</option>
+<option value="medium_sieve">medium_sieve</option>
+<option value="small_sieve">small_sieve</option>
+<option value="tiny_sieve">tiny_sieve</option>
+<option value="bottom">bottom</option>
+    </param>
+<param name="radius" type="int" max="9999" gui-text="radius" gui-description="Radius of the corners of the sieve pattern in mm. Enter 30 for circular holes.">3</param>
+<param name="wiggle" type="float" precision="2" max="9999" gui-text="wiggle" gui-description="Wiggle room, that the layers can slide in each other.">4</param>
+</page>
+<page name="tab_1" gui-text="Default"><param name="thickness" type="float" precision="2" max="9999" gui-text="thickness" gui-description="thickness of the material (in mm) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#thickness)">3.0</param>
+<param name="tabs" type="float" precision="2" max="9999" gui-text="tabs" gui-description="width of tabs holding the parts in place (in mm)(not supported everywhere) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#tabs)">0.0</param>
+<param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
+<param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
+<param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
+<param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
+<option value="loop">loop</option>
+<option value="corner">corner</option>
+<option value="backarc">backarc</option>
+    </param>
+<param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
+</page>
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<option value="rectangular">rectangular</option>
+<option value="springs">springs</option>
+<option value="barbs">barbs</option>
+<option value="snap">snap</option>
+    </param>
+<param name="FingerJoint_surroundingspaces" type="float" precision="2" max="9999" gui-text="surroundingspaces" gui-description="space at the start and end in multiple of normal spaces">2.0</param>
+<param name="FingerJoint_bottom_lip" type="float" precision="2" max="9999" gui-text="bottom_lip" gui-description="height of the bottom lips sticking out  (multiples of thickness) FingerHoleEdge only!">0.0</param>
+<param name="FingerJoint_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">3.0</param>
+<param name="FingerJoint_extra_length" type="float" precision="2" max="9999" gui-text="extra_length" gui-description="extra material to grind away burn marks (multiples of thickness)">0.0</param>
+<param name="FingerJoint_finger" type="float" precision="2" max="9999" gui-text="finger" gui-description="width of the fingers (multiples of thickness)">2.0</param>
+<param name="FingerJoint_play" type="float" precision="2" max="9999" gui-text="play" gui-description="extra space to allow finger move in and out (multiples of thickness)">0.0</param>
+<param name="FingerJoint_space" type="float" precision="2" max="9999" gui-text="space" gui-description="space between fingers (multiples of thickness)">2.0</param>
+<param name="FingerJoint_width" type="float" precision="2" max="9999" gui-text="width" gui-description="width of finger holes (multiples of thickness)">1.0</param>
+</page>
+<page name="tab_3" gui-text="Example">
+<image>./BrickSorter-thumb.jpg</image>
+</page>
+</param>
+<label appearance="url">https://www.festi.info/boxes.py/BrickSorter</label>
+<effect>
+    <object-type>all</object-type>
+    <effects-menu>
+        <submenu name="FabLab Chemnitz Boxes.py">
+            <submenu name="Boxes"/>
+        </submenu>
+    </effects-menu>
+</effect>
+<script>
+    <command location="inx" interpreter="python">boxes_proxy.py</command>
+</script>
+</inkscape-extension>
\ No newline at end of file
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.BurnTest.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.BurnTest.inx
index 513c61b..0048d5c 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.BurnTest.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.BurnTest.inx
@@ -14,7 +14,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -22,8 +22,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.CanStorage.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.CanStorage.inx
index a0a7257..b3f0261 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.CanStorage.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.CanStorage.inx
@@ -24,7 +24,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -32,8 +32,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.CarbonFilter.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.CarbonFilter.inx
index 8de63fb..e843b5b 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.CarbonFilter.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.CarbonFilter.inx
@@ -14,7 +14,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -22,8 +22,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.CardBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.CardBox.inx
index b3fae36..8f93fb1 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.CardBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.CardBox.inx
@@ -24,7 +24,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -32,8 +32,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.CardHolder.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.CardHolder.inx
index e668139..5a7de7c 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.CardHolder.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.CardHolder.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -43,8 +43,7 @@
 <param name="Grooved_tri_angle" type="int" max="9999" gui-text="tri_angle" gui-description="the angle of triangular cuts">30</param>
 <param name="Grooved_width" type="float" precision="2" max="9999" gui-text="width" gui-description="the width of each groove (fraction of the edge length)">0.2</param>
 </page>
-<page name="tab_4" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_4" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Castle.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Castle.inx
index 3aae195..1c2727f 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Castle.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Castle.inx
@@ -8,7 +8,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -16,8 +16,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.ClosedBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.ClosedBox.inx
index fc8d749..5e41239 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.ClosedBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.ClosedBox.inx
@@ -13,7 +13,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -21,8 +21,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.CoffeeCapsuleHolder.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.CoffeeCapsuleHolder.inx
index 821c728..7413e66 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.CoffeeCapsuleHolder.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.CoffeeCapsuleHolder.inx
@@ -12,7 +12,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.CoinBankSafe.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.CoinBankSafe.inx
index 8abb718..9263eb1 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.CoinBankSafe.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.CoinBankSafe.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -24,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.CoinDisplay.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.CoinDisplay.inx
index c0be2c3..656663d 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.CoinDisplay.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.CoinDisplay.inx
@@ -17,7 +17,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -25,8 +25,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.CompartmentBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.CompartmentBox.inx
new file mode 100644
index 0000000..351b4ae
--- /dev/null
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.CompartmentBox.inx
@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+<name>CompartmentBox</name>
+<id>info.festi.boxes.py.CompartmentBox</id>
+<param name="generator" type="string" gui-hidden="true">compartmentbox</param>
+<param name="tab" type="notebook"><page name="tab_0" gui-text="CompartmentBox"><param name="sx" type="string" gui-text="sx" gui-description="sections left to right in mm [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#section-parameters)">50*3</param>
+<param name="sy" type="string" gui-text="sy" gui-description="sections back to front in mm [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#section-parameters)">50*3</param>
+<param name="h" type="float" precision="2" max="9999" gui-text="h" gui-description="inner height in mm (unless outside selected)">100.0</param>
+<param name="outside" type="bool" gui-text="outside" gui-description="treat sizes as outside measurements [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#outside)">true</param>
+        <param name="bottom_edge" type="optiongroup" appearance="combo" gui-text="bottom_edge" gui-description="edge type for bottom edge">
+            <option value="F">F Finger Joint (opposing side)</option>
+            <option value="h">h Edge (parallel Finger Joint Holes)</option>
+            <option value="s">s Stackable (bottom, finger joint holes)</option>
+            <option value="e">e Straight Edge</option>
+      </param>
+<param name="handle" type="optiongroup" appearance="combo" gui-text="handle" gui-description="how to grab the lid to remove">
+<option value="hole">hole</option>
+<option value="lip">lip</option>
+<option value="none">none</option>
+    </param>
+<param name="radius" type="float" precision="2" max="9999" gui-text="radius" gui-description="radius of the grip hole in mm">10</param>
+<param name="holes" type="string" gui-text="holes" gui-description="width of hole(s) in percentage of maximum hole width">70</param>
+<param name="margin_t" type="float" precision="2" max="9999" gui-text="margin_t" gui-description="vertical margin for sliding lid (multiples of thickness)">0.1</param>
+<param name="margin_s" type="float" precision="2" max="9999" gui-text="margin_s" gui-description="margin to add at both sides of sliding lid (multiples of thickness)">0.05</param>
+<param name="split_lip" type="bool" gui-text="split_lip" gui-description="create two strips to reduce waste material">true</param>
+</page>
+<page name="tab_1" gui-text="Default"><param name="thickness" type="float" precision="2" max="9999" gui-text="thickness" gui-description="thickness of the material (in mm) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#thickness)">3.0</param>
+<param name="tabs" type="float" precision="2" max="9999" gui-text="tabs" gui-description="width of tabs holding the parts in place (in mm)(not supported everywhere) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#tabs)">0.0</param>
+<param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
+<param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
+<param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
+<param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
+<option value="loop">loop</option>
+<option value="corner">corner</option>
+<option value="backarc">backarc</option>
+    </param>
+<param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
+</page>
+<page name="tab_2" gui-text="Stackable Edges"><param name="Stackable_angle" type="int" max="9999" gui-text="angle" gui-description="inside angle of the feet">60</param>
+<param name="Stackable_bottom_stabilizers" type="float" precision="2" max="9999" gui-text="bottom_stabilizers" gui-description="height of strips to be glued to the inside of bottom edges (multiples of thickness)">0.0</param>
+<param name="Stackable_height" type="float" precision="2" max="9999" gui-text="height" gui-description="height of the feet (multiples of thickness)">2.0</param>
+<param name="Stackable_holedistance" type="float" precision="2" max="9999" gui-text="holedistance" gui-description="distance from finger holes to bottom edge (multiples of thickness)">1.0</param>
+<param name="Stackable_width" type="float" precision="2" max="9999" gui-text="width" gui-description="width of the feet (multiples of thickness)">4.0</param>
+</page>
+<page name="tab_3" gui-text="Example">
+<image>./CompartmentBox-thumb.jpg</image>
+</page>
+</param>
+<label appearance="url">https://www.festi.info/boxes.py/CompartmentBox</label>
+<effect>
+    <object-type>all</object-type>
+    <effects-menu>
+        <submenu name="FabLab Chemnitz Boxes.py">
+            <submenu name="Trays and Drawer Inserts"/>
+        </submenu>
+    </effects-menu>
+</effect>
+<script>
+    <command location="inx" interpreter="python">boxes_proxy.py</command>
+</script>
+</inkscape-extension>
\ No newline at end of file
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.ConcaveKnob.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.ConcaveKnob.inx
index beaf93c..b3386f2 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.ConcaveKnob.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.ConcaveKnob.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Console.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Console.inx
index e41a7af..3c65d8a 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Console.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Console.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -23,8 +23,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Console2.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Console2.inx
index 34fb238..a76140e 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Console2.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Console2.inx
@@ -24,7 +24,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -32,8 +32,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Desksign.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Desksign.inx
index 7335a34..c418638 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Desksign.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Desksign.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -24,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.DiceBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.DiceBox.inx
index 11f7fc0..80d9e22 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.DiceBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.DiceBox.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -24,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.DiceTower.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.DiceTower.inx
new file mode 100644
index 0000000..7415098
--- /dev/null
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.DiceTower.inx
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+<name>DiceTower</name>
+<id>info.festi.boxes.py.DiceTower</id>
+<param name="generator" type="string" gui-hidden="true">dicetower</param>
+<param name="tab" type="notebook"><page name="tab_0" gui-text="DiceTower"><param name="width" type="float" precision="2" max="9999" gui-text="width" gui-description="width of the tower (side where the dice fall out)">80.0</param>
+<param name="depth" type="float" precision="2" max="9999" gui-text="depth" gui-description="depth of the tower">80.0</param>
+<param name="height" type="float" precision="2" max="9999" gui-text="height" gui-description="height of the tower">170.0</param>
+<param name="outside" type="bool" gui-text="outside" gui-description="treat sizes as outside measurements [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#outside)">true</param>
+<param name="bottom" type="bool" gui-text="bottom" gui-description="include bottom piece">true</param>
+<param name="ramps" type="int" max="9999" gui-text="ramps" gui-description="number of ramps in the tower">3</param>
+<param name="angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of the ramps in the tower">30.0</param>
+</page>
+<page name="tab_1" gui-text="Default"><param name="thickness" type="float" precision="2" max="9999" gui-text="thickness" gui-description="thickness of the material (in mm) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#thickness)">3.0</param>
+<param name="tabs" type="float" precision="2" max="9999" gui-text="tabs" gui-description="width of tabs holding the parts in place (in mm)(not supported everywhere) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#tabs)">0.0</param>
+<param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
+<param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
+<param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
+<param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
+<option value="loop">loop</option>
+<option value="corner">corner</option>
+<option value="backarc">backarc</option>
+    </param>
+<param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
+</page>
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<option value="rectangular">rectangular</option>
+<option value="springs">springs</option>
+<option value="barbs">barbs</option>
+<option value="snap">snap</option>
+    </param>
+<param name="FingerJoint_surroundingspaces" type="float" precision="2" max="9999" gui-text="surroundingspaces" gui-description="space at the start and end in multiple of normal spaces">2.0</param>
+<param name="FingerJoint_bottom_lip" type="float" precision="2" max="9999" gui-text="bottom_lip" gui-description="height of the bottom lips sticking out  (multiples of thickness) FingerHoleEdge only!">0.0</param>
+<param name="FingerJoint_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
+<param name="FingerJoint_extra_length" type="float" precision="2" max="9999" gui-text="extra_length" gui-description="extra material to grind away burn marks (multiples of thickness)">0.0</param>
+<param name="FingerJoint_finger" type="float" precision="2" max="9999" gui-text="finger" gui-description="width of the fingers (multiples of thickness)">2.0</param>
+<param name="FingerJoint_play" type="float" precision="2" max="9999" gui-text="play" gui-description="extra space to allow finger move in and out (multiples of thickness)">0.0</param>
+<param name="FingerJoint_space" type="float" precision="2" max="9999" gui-text="space" gui-description="space between fingers (multiples of thickness)">2.0</param>
+<param name="FingerJoint_width" type="float" precision="2" max="9999" gui-text="width" gui-description="width of finger holes (multiples of thickness)">1.0</param>
+</page>
+<page name="tab_3" gui-text="Example">
+<image>./DiceTower-thumb.jpg</image>
+</page>
+</param>
+<label appearance="url">https://www.festi.info/boxes.py/DiceTower</label>
+<effect>
+    <object-type>all</object-type>
+    <effects-menu>
+        <submenu name="FabLab Chemnitz Boxes.py">
+            <submenu name="Misc"/>
+        </submenu>
+    </effects-menu>
+</effect>
+<script>
+    <command location="inx" interpreter="python">boxes_proxy.py</command>
+</script>
+</inkscape-extension>
\ No newline at end of file
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.DinRailBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.DinRailBox.inx
index 5b77d2d..c13f393 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.DinRailBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.DinRailBox.inx
@@ -14,7 +14,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -22,8 +22,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.DiscRack.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.DiscRack.inx
index 3f111aa..d201936 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.DiscRack.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.DiscRack.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -24,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Dispenser.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Dispenser.inx
index c6be1e9..1022a89 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Dispenser.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Dispenser.inx
@@ -18,7 +18,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -26,8 +26,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Display.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Display.inx
index ddaa79d..e21c20b 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Display.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Display.inx
@@ -13,7 +13,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.DisplayCase.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.DisplayCase.inx
index a802ea3..60bd025 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.DisplayCase.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.DisplayCase.inx
@@ -14,7 +14,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -22,8 +22,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.DisplayShelf.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.DisplayShelf.inx
index 0c738cc..a8c288f 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.DisplayShelf.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.DisplayShelf.inx
@@ -11,15 +11,19 @@
 <param name="front_wall_height" type="float" precision="2" max="9999" gui-text="front_wall_height" gui-description="height of front walls">20.0</param>
 <param name="angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of floors (negative values for slanting backwards)">30.0</param>
 <param name="include_back" type="bool" gui-text="include_back" gui-description="Include panel on the back of the shelf">false</param>
+<param name="include_front" type="bool" gui-text="include_front" gui-description="Include panel on the front of the shelf (to be used backwards)">false</param>
+<param name="include_bottom" type="bool" gui-text="include_bottom" gui-description="Include horizontal panel on the bottom of the shelf">false</param>
 <param name="slope_top" type="bool" gui-text="slope_top" gui-description="Slope the sides and the top by front wall height">false</param>
 <param name="divider_wall_height" type="float" precision="2" max="9999" gui-text="divider_wall_height" gui-description="height of divider walls">20.0</param>
+<param name="bottom_distance" type="float" precision="2" max="9999" gui-text="bottom_distance" gui-description="height below the bottom shelf">0.0</param>
+<param name="top_distance" type="float" precision="2" max="9999" gui-text="top_distance" gui-description="extra height above the top shelf">0.0</param>
 </page>
 <page name="tab_1" gui-text="Default"><param name="thickness" type="float" precision="2" max="9999" gui-text="thickness" gui-description="thickness of the material (in mm) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#thickness)">3.0</param>
 <param name="tabs" type="float" precision="2" max="9999" gui-text="tabs" gui-description="width of tabs holding the parts in place (in mm)(not supported everywhere) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#tabs)">0.0</param>
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -27,8 +31,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.DividerTray.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.DividerTray.inx
index 60fc542..bbaf609 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.DividerTray.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.DividerTray.inx
@@ -18,7 +18,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -26,8 +26,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.DoubleFlexDoorBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.DoubleFlexDoorBox.inx
index 260bf5d..7d30572 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.DoubleFlexDoorBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.DoubleFlexDoorBox.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -23,8 +23,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.DrillBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.DrillBox.inx
index afc2221..82e221a 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.DrillBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.DrillBox.inx
@@ -27,7 +27,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -35,8 +35,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.DrillStand.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.DrillStand.inx
index a6f3e94..c7f1b9d 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.DrillStand.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.DrillStand.inx
@@ -13,7 +13,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -27,8 +27,7 @@
 <param name="Stackable_holedistance" type="float" precision="2" max="9999" gui-text="holedistance" gui-description="distance from finger holes to bottom edge (multiples of thickness)">1.0</param>
 <param name="Stackable_width" type="float" precision="2" max="9999" gui-text="width" gui-description="width of the feet (multiples of thickness)">3.0</param>
 </page>
-<page name="tab_3" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_3" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.ElectronicsBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.ElectronicsBox.inx
index d32a12c..1640dc9 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.ElectronicsBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.ElectronicsBox.inx
@@ -19,7 +19,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -27,8 +27,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.EuroRackSkiff.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.EuroRackSkiff.inx
index 41a239e..012a916 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.EuroRackSkiff.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.EuroRackSkiff.inx
@@ -11,7 +11,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -19,8 +19,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.FanHole.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.FanHole.inx
index 2b51624..61e7797 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.FanHole.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.FanHole.inx
@@ -19,7 +19,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.FilamentSpool.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.FilamentSpool.inx
index 3bfbc7c..5e0c126 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.FilamentSpool.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.FilamentSpool.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -23,8 +23,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.FillTest.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.FillTest.inx
index 128bd93..a5b3382 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.FillTest.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.FillTest.inx
@@ -11,7 +11,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBook.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBook.inx
index fc9f611..0f85b8e 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBook.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBook.inx
@@ -14,7 +14,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -22,8 +22,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox.inx
index ca7655d..05d67ce 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -23,8 +23,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox2.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox2.inx
index bb0cbc3..3b5e2d9 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox2.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox2.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -23,8 +23,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox3.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox3.inx
index 24a7004..df5bbc6 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox3.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox3.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -24,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox4.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox4.inx
index ef864ba..4495564 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox4.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox4.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -23,8 +23,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox5.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox5.inx
index d846d7c..1f26950 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox5.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexBox5.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -23,8 +23,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexTest.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexTest.inx
index 92e6df7..3603f47 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexTest.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexTest.inx
@@ -11,7 +11,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexTest2.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexTest2.inx
index 41c8868..4ad49b1 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.FlexTest2.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.FlexTest2.inx
@@ -12,7 +12,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Folder.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Folder.inx
index 905dbf0..7e9ef0e 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Folder.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Folder.inx
@@ -13,7 +13,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.FrontPanel.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.FrontPanel.inx
index 2da1a07..1c55323 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.FrontPanel.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.FrontPanel.inx
@@ -8,7 +8,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.GearBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.GearBox.inx
index 375fa88..c3bb260 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.GearBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.GearBox.inx
@@ -14,7 +14,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -22,8 +22,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Gears.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Gears.inx
index 8a358a5..3415ba8 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Gears.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Gears.inx
@@ -18,7 +18,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.GridfinityBase.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.GridfinityBase.inx
index eedbfdc..20161a5 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.GridfinityBase.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.GridfinityBase.inx
@@ -21,7 +21,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -29,8 +29,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.GridfinityDrillBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.GridfinityDrillBox.inx
new file mode 100644
index 0000000..b846d3b
--- /dev/null
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.GridfinityDrillBox.inx
@@ -0,0 +1,106 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+<name>GridfinityDrillBox</name>
+<id>info.festi.boxes.py.GridfinityDrillBox</id>
+<param name="generator" type="string" gui-hidden="true">gridfinitydrillbox</param>
+<param name="tab" type="notebook"><page name="tab_0" gui-text="GridfinityDrillBox"><param name="nx" type="int" max="9999" gui-text="nx" gui-description="number of gridfinity grids in X direction">3</param>
+<param name="ny" type="int" max="9999" gui-text="ny" gui-description="number of gridfinity grids in Y direction">2</param>
+<param name="margin" type="float" precision="2" max="9999" gui-text="margin" gui-description="Leave this much total margin on the outside, in mm">0.75</param>
+        <param name="top_edge" type="optiongroup" appearance="combo" gui-text="top_edge" gui-description="edge type for top edge">
+            <option value="e">e Straight Edge</option>
+            <option value="S">S Stackable (top)</option>
+            <option value="t">t Triangle for handle</option>
+            <option value="G">G Edge with pear shaped mounting holes</option>
+      </param>
+<param name="sh" type="string" gui-text="sh" gui-description="sections bottom to top in mm [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#section-parameters)">5:25:10</param>
+</page>
+<page name="tab_1" gui-text="Default"><param name="thickness" type="float" precision="2" max="9999" gui-text="thickness" gui-description="thickness of the material (in mm) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#thickness)">3.0</param>
+<param name="tabs" type="float" precision="2" max="9999" gui-text="tabs" gui-description="width of tabs holding the parts in place (in mm)(not supported everywhere) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#tabs)">0.0</param>
+<param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
+<param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
+<param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
+<param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
+<option value="loop">loop</option>
+<option value="corner">corner</option>
+<option value="backarc">backarc</option>
+    </param>
+<param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
+</page>
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<option value="rectangular">rectangular</option>
+<option value="springs">springs</option>
+<option value="barbs">barbs</option>
+<option value="snap">snap</option>
+    </param>
+<param name="FingerJoint_surroundingspaces" type="float" precision="2" max="9999" gui-text="surroundingspaces" gui-description="space at the start and end in multiple of normal spaces">1.0</param>
+<param name="FingerJoint_bottom_lip" type="float" precision="2" max="9999" gui-text="bottom_lip" gui-description="height of the bottom lips sticking out  (multiples of thickness) FingerHoleEdge only!">0.0</param>
+<param name="FingerJoint_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
+<param name="FingerJoint_extra_length" type="float" precision="2" max="9999" gui-text="extra_length" gui-description="extra material to grind away burn marks (multiples of thickness)">0.0</param>
+<param name="FingerJoint_finger" type="float" precision="2" max="9999" gui-text="finger" gui-description="width of the fingers (multiples of thickness)">3.0</param>
+<param name="FingerJoint_play" type="float" precision="2" max="9999" gui-text="play" gui-description="extra space to allow finger move in and out (multiples of thickness)">0.0</param>
+<param name="FingerJoint_space" type="float" precision="2" max="9999" gui-text="space" gui-description="space between fingers (multiples of thickness)">3.0</param>
+<param name="FingerJoint_width" type="float" precision="2" max="9999" gui-text="width" gui-description="width of finger holes (multiples of thickness)">1.0</param>
+</page>
+<page name="tab_3" gui-text="RoundedTriangleEdge"><param name="RoundedTriangleEdge_height" type="float" precision="2" max="9999" gui-text="height" gui-description="height above the wall">50.0</param>
+<param name="RoundedTriangleEdge_r_hole" type="float" precision="2" max="9999" gui-text="r_hole" gui-description="radius of hole">2.0</param>
+<param name="RoundedTriangleEdge_radius" type="float" precision="2" max="9999" gui-text="radius" gui-description="radius of top corner">30.0</param>
+<param name="RoundedTriangleEdge_outset" type="float" precision="2" max="9999" gui-text="outset" gui-description="extend the triangle along the length of the edge (multiples of thickness)">1.0</param>
+</page>
+<page name="tab_4" gui-text="Stackable Edges"><param name="Stackable_angle" type="int" max="9999" gui-text="angle" gui-description="inside angle of the feet">60</param>
+<param name="Stackable_bottom_stabilizers" type="float" precision="2" max="9999" gui-text="bottom_stabilizers" gui-description="height of strips to be glued to the inside of bottom edges (multiples of thickness)">0.0</param>
+<param name="Stackable_height" type="float" precision="2" max="9999" gui-text="height" gui-description="height of the feet (multiples of thickness)">2.0</param>
+<param name="Stackable_holedistance" type="float" precision="2" max="9999" gui-text="holedistance" gui-description="distance from finger holes to bottom edge (multiples of thickness)">1.0</param>
+<param name="Stackable_width" type="float" precision="2" max="9999" gui-text="width" gui-description="width of the feet (multiples of thickness)">4.0</param>
+</page>
+<page name="tab_5" gui-text="Mounting Edge"><param name="Mounting_d_head" type="float" precision="2" max="9999" gui-text="d_head" gui-description="head diameter of mounting screw (in mm)">6.5</param>
+<param name="Mounting_d_shaft" type="float" precision="2" max="9999" gui-text="d_shaft" gui-description="shaft diameter of mounting screw (in mm)">3.0</param>
+<param name="Mounting_margin" type="float" precision="2" max="9999" gui-text="margin" gui-description="minimum space left and right without holes (fraction of the edge length)">0.125</param>
+<param name="Mounting_num" type="int" max="9999" gui-text="num" gui-description="number of mounting holes (integer)">2</param>
+<param name="Mounting_side" type="optiongroup" appearance="combo" gui-text="side" gui-description="side of box (not all valid configurations make sense...)">
+<option value="back">back</option>
+<option value="left">left</option>
+<option value="right">right</option>
+<option value="front">front</option>
+    </param>
+<param name="Mounting_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="edge style">
+<option value="straight edge, within">straight edge, within</option>
+<option value="straight edge, extended">straight edge, extended</option>
+<option value="mounting tab">mounting tab</option>
+    </param>
+</page>
+<page name="tab_6" gui-text="the Lid"><param name="Lid_handle" type="optiongroup" appearance="combo" gui-text="handle" gui-description="type of handle">
+<option value="none">none</option>
+<option value="long_rounded">long_rounded</option>
+<option value="long_trapezoid">long_trapezoid</option>
+<option value="long_doublerounded">long_doublerounded</option>
+<option value="knob">knob</option>
+    </param>
+<param name="Lid_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="type of lid to create">
+<option value="none">none</option>
+<option value="flat">flat</option>
+<option value="chest">chest</option>
+<option value="overthetop">overthetop</option>
+<option value="ontop">ontop</option>
+    </param>
+<param name="Lid_handle_height" type="float" precision="2" max="9999" gui-text="handle_height" gui-description="height of the handle (if applicable)">8.0</param>
+<param name="Lid_height" type="float" precision="2" max="9999" gui-text="height" gui-description="height of the brim (if any)">4.0</param>
+<param name="Lid_play" type="float" precision="2" max="9999" gui-text="play" gui-description="play when sliding the lid on (if applicable)">0.1</param>
+</page>
+<page name="tab_7" gui-text="Example">
+<image>./GridfinityDrillBox-thumb.jpg</image>
+</page>
+</param>
+<label appearance="url">https://www.festi.info/boxes.py/GridfinityDrillBox</label>
+<effect>
+    <object-type>all</object-type>
+    <effects-menu>
+        <submenu name="FabLab Chemnitz Boxes.py">
+            <submenu name="Trays and Drawer Inserts"/>
+        </submenu>
+    </effects-menu>
+</effect>
+<script>
+    <command location="inx" interpreter="python">boxes_proxy.py</command>
+</script>
+</inkscape-extension>
\ No newline at end of file
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.GridfinityTrayLayout.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.GridfinityTrayLayout.inx
index b71c545..d3fead6 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.GridfinityTrayLayout.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.GridfinityTrayLayout.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -24,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.HalfBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.HalfBox.inx
index f84ff7c..b4643d7 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.HalfBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.HalfBox.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -24,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.HeartBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.HeartBox.inx
index c24482a..7c02ee0 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.HeartBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.HeartBox.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -24,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.HingeBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.HingeBox.inx
index 008120c..74b0cd5 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.HingeBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.HingeBox.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -23,8 +23,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.HolePattern.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.HolePattern.inx
index 2dc74ca..0d3d75e 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.HolePattern.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.HolePattern.inx
@@ -18,7 +18,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Hook.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Hook.inx
index d18f81f..e88a3fd 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Hook.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Hook.inx
@@ -14,7 +14,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -22,8 +22,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.IntegratedHingeBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.IntegratedHingeBox.inx
index bbd3a37..06a9de7 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.IntegratedHingeBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.IntegratedHingeBox.inx
@@ -14,7 +14,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -22,8 +22,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.JointPanel.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.JointPanel.inx
index 01a6bcf..bd17cee 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.JointPanel.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.JointPanel.inx
@@ -12,7 +12,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.KeyHolder.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.KeyHolder.inx
index f501236..297ef9f 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.KeyHolder.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.KeyHolder.inx
@@ -17,7 +17,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -25,8 +25,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Keypad.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Keypad.inx
index fa10578..d3e3904 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Keypad.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Keypad.inx
@@ -18,7 +18,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -26,8 +26,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.LBeam.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.LBeam.inx
index 040bd23..cdf6856 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.LBeam.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.LBeam.inx
@@ -13,7 +13,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -21,8 +21,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.LaptopStand.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.LaptopStand.inx
index 952ef64..aae55b0 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.LaptopStand.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.LaptopStand.inx
@@ -14,7 +14,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.LaserClamp.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.LaserClamp.inx
index 1871d9d..a3682b3 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.LaserClamp.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.LaserClamp.inx
@@ -12,7 +12,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -20,8 +20,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.LaserHoldfast.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.LaserHoldfast.inx
index 0950754..37a989f 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.LaserHoldfast.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.LaserHoldfast.inx
@@ -13,7 +13,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.MagazineFile.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.MagazineFile.inx
index 8958d32..664bceb 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.MagazineFile.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.MagazineFile.inx
@@ -18,7 +18,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -26,8 +26,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.MakitaPowerSupply.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.MakitaPowerSupply.inx
index 72eefd5..ba988e2 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.MakitaPowerSupply.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.MakitaPowerSupply.inx
@@ -4,14 +4,19 @@
 <id>info.festi.boxes.py.MakitaPowerSupply</id>
 <param name="generator" type="string" gui-hidden="true">makitapowersupply</param>
 <param name="tab" type="notebook"><page name="tab_0" gui-text="MakitaPowerSupply"><param name="banana_socket_diameter" type="float" precision="2" max="9999" gui-text="banana_socket_diameter" gui-description="diameter of the banana socket mounting holes">8.0</param>
-<param name="flipswitch_diameter" type="float" precision="2" max="9999" gui-text="flipswitch_diameter" gui-description="diameter of the flipswitch mounting hole">6.3</param>
+<param name="flipswitch_diameter" type="float" precision="2" max="9999" gui-text="flipswitch_diameter" gui-description="diameter of the flipswitch mounting hole (disabled of no secondary power)">6.3</param>
+<param name="secondary_power" type="optiongroup" appearance="combo" gui-text="secondary_power" gui-description="style of secondary power input">
+<option value="ibm-barrel">ibm-barrel</option>
+<option value="usb-c">usb-c</option>
+<option value="none">none</option>
+    </param>
 </page>
 <page name="tab_1" gui-text="Default"><param name="thickness" type="float" precision="2" max="9999" gui-text="thickness" gui-description="thickness of the material (in mm) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#thickness)">3.0</param>
 <param name="tabs" type="float" precision="2" max="9999" gui-text="tabs" gui-description="width of tabs holding the parts in place (in mm)(not supported everywhere) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#tabs)">0.0</param>
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -19,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Matrix.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Matrix.inx
new file mode 100644
index 0000000..a958a77
--- /dev/null
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Matrix.inx
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+<name>Matrix</name>
+<id>info.festi.boxes.py.Matrix</id>
+<param name="generator" type="string" gui-hidden="true">matrix</param>
+<param name="tab" type="notebook"><page name="tab_0" gui-text="Matrix"><param name="led_width" type="int" max="9999" gui-text="led_width" gui-description="Width of the LED matrix in pixels">16</param>
+<param name="led_height" type="int" max="9999" gui-text="led_height" gui-description="Height of the LED matrix in pixels">16</param>
+<param name="pysical_led_y" type="int" max="9999" gui-text="pysical_led_y" gui-description="Width of the LED matrix pcb in mm">160</param>
+<param name="pysical_led_x" type="int" max="9999" gui-text="pysical_led_x" gui-description="Height of the LED matrix pcb in mm">160</param>
+<param name="matrix_back_frame_border" type="int" max="9999" gui-text="matrix_back_frame_border" gui-description="Border of the back frame bo keep the pcb in blace but allow for air flow and cable management">20</param>
+<param name="matrix_front_frame_border_offset" type="int" max="9999" gui-text="matrix_front_frame_border_offset" gui-description="Offset of the front frame to allow for the plexiglass to be attached">10</param>
+<param name="distance_between_leds" type="float" precision="2" max="9999" gui-text="distance_between_leds" gui-description="Distance of the color dividers. Make sure your machine is able to cut thin structures.">1</param>
+<param name="h" type="int" max="9999" gui-text="h" gui-description="Height of the matrix">30</param>
+<param name="height_pcb" type="float" precision="2" max="9999" gui-text="height_pcb" gui-description="Height of the pcb including the highest non led components in mm">0.2</param>
+<param name="plexiglass_thicknes" type="float" precision="2" max="9999" gui-text="plexiglass_thicknes" gui-description="Thickness of the plexiglass in mm">3</param>
+<param name="mounting_holes" type="bool" gui-text="mounting_holes" gui-description="Add mounting holes for the enclosure">false</param>
+<param name="mounting_hole_diameter" type="float" precision="2" max="9999" gui-text="mounting_hole_diameter" gui-description="Diameter of the mounting holes in mm">5</param>
+<param name="matrix_count_x" type="int" max="9999" gui-text="matrix_count_x" gui-description="Number of modules in x direction">1</param>
+<param name="matrix_count_y" type="int" max="9999" gui-text="matrix_count_y" gui-description="Number of modules in y direction">1</param>
+</page>
+<page name="tab_1" gui-text="Default"><param name="thickness" type="float" precision="2" max="9999" gui-text="thickness" gui-description="thickness of the material (in mm) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#thickness)">3.0</param>
+<param name="tabs" type="float" precision="2" max="9999" gui-text="tabs" gui-description="width of tabs holding the parts in place (in mm)(not supported everywhere) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#tabs)">0.0</param>
+<param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
+<param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
+<param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
+<param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
+<option value="loop">loop</option>
+<option value="corner">corner</option>
+<option value="backarc">backarc</option>
+    </param>
+<param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
+</page>
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<option value="rectangular">rectangular</option>
+<option value="springs">springs</option>
+<option value="barbs">barbs</option>
+<option value="snap">snap</option>
+    </param>
+<param name="FingerJoint_surroundingspaces" type="float" precision="2" max="9999" gui-text="surroundingspaces" gui-description="space at the start and end in multiple of normal spaces">2.0</param>
+<param name="FingerJoint_bottom_lip" type="float" precision="2" max="9999" gui-text="bottom_lip" gui-description="height of the bottom lips sticking out  (multiples of thickness) FingerHoleEdge only!">0.0</param>
+<param name="FingerJoint_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
+<param name="FingerJoint_extra_length" type="float" precision="2" max="9999" gui-text="extra_length" gui-description="extra material to grind away burn marks (multiples of thickness)">0.0</param>
+<param name="FingerJoint_finger" type="float" precision="2" max="9999" gui-text="finger" gui-description="width of the fingers (multiples of thickness)">2.0</param>
+<param name="FingerJoint_play" type="float" precision="2" max="9999" gui-text="play" gui-description="extra space to allow finger move in and out (multiples of thickness)">0.0</param>
+<param name="FingerJoint_space" type="float" precision="2" max="9999" gui-text="space" gui-description="space between fingers (multiples of thickness)">2.0</param>
+<param name="FingerJoint_width" type="float" precision="2" max="9999" gui-text="width" gui-description="width of finger holes (multiples of thickness)">1.0</param>
+</page>
+<page name="tab_3" gui-text="Example">
+<image>./Matrix-thumb.jpg</image>
+</page>
+</param>
+<label appearance="url">https://www.festi.info/boxes.py/Matrix</label>
+<effect>
+    <object-type>all</object-type>
+    <effects-menu>
+        <submenu name="FabLab Chemnitz Boxes.py">
+            <submenu name="Misc"/>
+        </submenu>
+    </effects-menu>
+</effect>
+<script>
+    <command location="inx" interpreter="python">boxes_proxy.py</command>
+</script>
+</inkscape-extension>
\ No newline at end of file
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.NemaMount.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.NemaMount.inx
index d07002f..4d2d1a5 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.NemaMount.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.NemaMount.inx
@@ -20,7 +20,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -28,8 +28,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.NemaPattern.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.NemaPattern.inx
index 01c139a..0d04f16 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.NemaPattern.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.NemaPattern.inx
@@ -21,7 +21,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -29,8 +29,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.NotesHolder.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.NotesHolder.inx
index d595072..fd92728 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.NotesHolder.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.NotesHolder.inx
@@ -21,7 +21,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -29,8 +29,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.OpenBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.OpenBox.inx
index 0e48346..b2a41ff 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.OpenBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.OpenBox.inx
@@ -17,7 +17,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -25,8 +25,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.OrganPipe.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.OrganPipe.inx
index e45b597..cc7518e 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.OrganPipe.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.OrganPipe.inx
@@ -36,7 +36,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -44,8 +44,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.OttoBody.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.OttoBody.inx
index 172b1c2..5f11aa4 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.OttoBody.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.OttoBody.inx
@@ -8,7 +8,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -16,8 +16,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.OttoLegs.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.OttoLegs.inx
index 2bd25f0..df19dae 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.OttoLegs.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.OttoLegs.inx
@@ -12,7 +12,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -20,8 +20,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.OttoSoles.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.OttoSoles.inx
index 2e7350c..1c436b7 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.OttoSoles.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.OttoSoles.inx
@@ -14,7 +14,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.PaintStorage.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.PaintStorage.inx
index 6f322c3..1d520f6 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.PaintStorage.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.PaintStorage.inx
@@ -18,7 +18,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -26,8 +26,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.PaperBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.PaperBox.inx
index 0abceba..2730564 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.PaperBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.PaperBox.inx
@@ -24,7 +24,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.PhoneHolder.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.PhoneHolder.inx
index 6d12c7b..a84c679 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.PhoneHolder.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.PhoneHolder.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -24,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.PhotoFrame.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.PhotoFrame.inx
new file mode 100644
index 0000000..511b86e
--- /dev/null
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.PhotoFrame.inx
@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+<name>PhotoFrame</name>
+<id>info.festi.boxes.py.PhotoFrame</id>
+<param name="generator" type="string" gui-hidden="true">photoframe</param>
+<param name="tab" type="notebook"><page name="tab_0" gui-text="PhotoFrame"><param name="x" type="float" precision="2" max="9999" gui-text="x" gui-description="Width of the photo, not including any border">100</param>
+<param name="y" type="float" precision="2" max="9999" gui-text="y" gui-description="Height of the photo, not including any border">150</param>
+<param name="golden_mat" type="bool" gui-text="golden_mat" gui-description="Use golden ratio to calculate matting width">true</param>
+<param name="matting_w" type="float" precision="2" max="9999" gui-text="matting_w" gui-description="Width of the matting border around the sides of the photo">0</param>
+<param name="matting_h" type="float" precision="2" max="9999" gui-text="matting_h" gui-description="Width of the matting border around top/bottom of the photo">0</param>
+<param name="matting_overlap" type="float" precision="2" max="9999" gui-text="matting_overlap" gui-description="Matting overlap of the photo, e.g. 2mm if photo has border, 5mm if not">2</param>
+<param name="glass_w" type="float" precision="2" max="9999" gui-text="glass_w" gui-description="Width of the pre-cut glass or acrylic">0</param>
+<param name="glass_h" type="float" precision="2" max="9999" gui-text="glass_h" gui-description="Height of the pre-cut glass or acrylic">0</param>
+<param name="frame_w" type="float" precision="2" max="9999" gui-text="frame_w" gui-description="Width of the frame border around the matting">20.0</param>
+<param name="guide_fudge" type="float" precision="2" max="9999" gui-text="guide_fudge" gui-description="Clearance in the guide pocket to help slide the matting/glass in">2.0</param>
+<param name="frame_overlap" type="float" precision="2" max="9999" gui-text="frame_overlap" gui-description="Frame overlap to hold the matting/glass in place">5.0</param>
+<param name="split_front" type="bool" gui-text="split_front" gui-description="Split front into thin rectangles to save material">true</param>
+</page>
+<page name="tab_1" gui-text="Default"><param name="thickness" type="float" precision="2" max="9999" gui-text="thickness" gui-description="thickness of the material (in mm) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#thickness)">3.0</param>
+<param name="tabs" type="float" precision="2" max="9999" gui-text="tabs" gui-description="width of tabs holding the parts in place (in mm)(not supported everywhere) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#tabs)">0.0</param>
+<param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
+<param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
+<param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
+<param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
+<option value="loop">loop</option>
+<option value="corner">corner</option>
+<option value="backarc">backarc</option>
+    </param>
+<param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
+</page>
+<page name="tab_2" gui-text="Mounting Edge"><param name="Mounting_d_head" type="float" precision="2" max="9999" gui-text="d_head" gui-description="head diameter of mounting screw (in mm)">8.0</param>
+<param name="Mounting_d_shaft" type="float" precision="2" max="9999" gui-text="d_shaft" gui-description="shaft diameter of mounting screw (in mm)">4.0</param>
+<param name="Mounting_margin" type="float" precision="2" max="9999" gui-text="margin" gui-description="minimum space left and right without holes (fraction of the edge length)">0.125</param>
+<param name="Mounting_num" type="int" max="9999" gui-text="num" gui-description="number of mounting holes (integer)">3</param>
+<param name="Mounting_side" type="optiongroup" appearance="combo" gui-text="side" gui-description="side of box (not all valid configurations make sense...)">
+<option value="back">back</option>
+<option value="left">left</option>
+<option value="right">right</option>
+<option value="front">front</option>
+    </param>
+<param name="Mounting_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="edge style">
+<option value="straight edge, within">straight edge, within</option>
+<option value="straight edge, extended">straight edge, extended</option>
+<option value="mounting tab">mounting tab</option>
+    </param>
+</page>
+<page name="tab_3" gui-text="Dove Tail Joints"><param name="DoveTail_angle" type="int" max="9999" gui-text="angle" gui-description="how much should fingers widen (-80 to 80)">50</param>
+<param name="DoveTail_depth" type="float" precision="2" max="9999" gui-text="depth" gui-description="how far the dove tails stick out of/into the edge (multiples of thickness)">1.0</param>
+<param name="DoveTail_radius" type="float" precision="2" max="9999" gui-text="radius" gui-description="radius used on all four corners (multiples of thickness)">0.2</param>
+<param name="DoveTail_size" type="int" max="9999" gui-text="size" gui-description="from one middle of a dove tail to another (multiples of thickness)">2</param>
+</page>
+<page name="tab_4" gui-text="Example">
+<image>./PhotoFrame-thumb.jpg</image>
+</page>
+</param>
+<label appearance="url">https://www.festi.info/boxes.py/PhotoFrame</label>
+<effect>
+    <object-type>all</object-type>
+    <effects-menu>
+        <submenu name="FabLab Chemnitz Boxes.py">
+            <submenu name="Misc"/>
+        </submenu>
+    </effects-menu>
+</effect>
+<script>
+    <command location="inx" interpreter="python">boxes_proxy.py</command>
+</script>
+</inkscape-extension>
\ No newline at end of file
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.PirateChest.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.PirateChest.inx
index f5ef968..4b0c21d 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.PirateChest.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.PirateChest.inx
@@ -14,7 +14,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -22,8 +22,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.PizzaShovel.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.PizzaShovel.inx
index 4272a4c..a0402b5 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.PizzaShovel.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.PizzaShovel.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -24,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Planetary.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Planetary.inx
index 2e7b53b..3389dc4 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Planetary.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Planetary.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Planetary2.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Planetary2.inx
index 7dce4cc..69269bd 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Planetary2.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Planetary2.inx
@@ -45,7 +45,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Platonic.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Platonic.inx
index f9770f6..218827d 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Platonic.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Platonic.inx
@@ -18,7 +18,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -26,8 +26,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.PoleHook.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.PoleHook.inx
index bc34f6c..b95b53d 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.PoleHook.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.PoleHook.inx
@@ -14,7 +14,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -22,8 +22,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Pulley.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Pulley.inx
index 510db70..91e3beb 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Pulley.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Pulley.inx
@@ -30,7 +30,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Rack10Box.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Rack10Box.inx
index ccbae38..f87766d 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Rack10Box.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Rack10Box.inx
@@ -31,7 +31,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -39,8 +39,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Rack19Box.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Rack19Box.inx
index ab00371..aff852a 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Rack19Box.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Rack19Box.inx
@@ -31,7 +31,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -39,8 +39,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Rack19HalfWidth.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Rack19HalfWidth.inx
index 61b26f3..3373187 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Rack19HalfWidth.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Rack19HalfWidth.inx
@@ -13,7 +13,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.RackBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.RackBox.inx
index c045bb8..495be05 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.RackBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.RackBox.inx
@@ -18,7 +18,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -26,8 +26,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.RectangularWall.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.RectangularWall.inx
index b317ad2..c170d95 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.RectangularWall.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.RectangularWall.inx
@@ -167,7 +167,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -195,8 +195,7 @@
 <param name="DoveTail_radius" type="float" precision="2" max="9999" gui-text="radius" gui-description="radius used on all four corners (multiples of thickness)">0.2</param>
 <param name="DoveTail_size" type="int" max="9999" gui-text="size" gui-description="from one middle of a dove tail to another (multiples of thickness)">3</param>
 </page>
-<page name="tab_5" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_5" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -240,8 +239,7 @@
 <param name="ChestHinge_pin_height" type="float" precision="2" max="9999" gui-text="pin_height" gui-description="radius of the disc rotating in the hinge (multiples of thickness)">2.0</param>
 <param name="ChestHinge_play" type="float" precision="2" max="9999" gui-text="play" gui-description="play">0.1</param>
 </page>
-<page name="tab_10" gui-text="Slide-on Lids"><param name="SlideOnLid_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="SlideOnLid_hole_width" type="int" max="9999" gui-text="hole_width" gui-description='width of the "finger hole" in mm'>0</param>
+<page name="tab_10" gui-text="Slide-on Lids"><param name="SlideOnLid_hole_width" type="int" max="9999" gui-text="hole_width" gui-description='width of the "finger hole" in mm'>0</param>
 <param name="SlideOnLid_second_pin" type="bool" gui-text="second_pin" gui-description="additional pin for better positioning">true</param>
 <param name="SlideOnLid_spring" type="optiongroup" appearance="combo" gui-text="spring" gui-description="position(s) of the extra locking springs in the lid">
 <option value="both">both</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.RegularBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.RegularBox.inx
index e8d7473..76066dd 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.RegularBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.RegularBox.inx
@@ -34,7 +34,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -42,8 +42,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.RegularStarBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.RegularStarBox.inx
index 26a3cba..86dda86 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.RegularStarBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.RegularStarBox.inx
@@ -17,7 +17,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -25,8 +25,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.RobotArm.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.RobotArm.inx
index 066e386..89aa621 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.RobotArm.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.RobotArm.inx
@@ -84,7 +84,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -92,8 +92,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.RollHolder.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.RollHolder.inx
index 791ff73..51b7fad 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.RollHolder.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.RollHolder.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -23,8 +23,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Rotary.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Rotary.inx
index ba8291b..92f2c1f 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Rotary.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Rotary.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -23,8 +23,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.RoundedBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.RoundedBox.inx
index e94fb4f..bea7a52 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.RoundedBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.RoundedBox.inx
@@ -30,7 +30,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -38,8 +38,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.RoundedRegularBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.RoundedRegularBox.inx
new file mode 100644
index 0000000..d3c5092
--- /dev/null
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.RoundedRegularBox.inx
@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+<name>RoundedRegularBox</name>
+<id>info.festi.boxes.py.RoundedRegularBox</id>
+<param name="generator" type="string" gui-hidden="true">roundedregularbox</param>
+<param name="tab" type="notebook"><page name="tab_0" gui-text="RoundedRegularBox"><param name="h" type="float" precision="2" max="9999" gui-text="h" gui-description="inner height in mm">100.0</param>
+<param name="sides" type="int" max="9999" gui-text="sides" gui-description="number of sides">5</param>
+<param name="inner_size" type="float" precision="2" max="9999" gui-text="inner_size" gui-description="diameter of the inner circle in mm">150</param>
+<param name="radius" type="float" precision="2" max="9999" gui-text="radius" gui-description="Radius of the corners in mm">15</param>
+<param name="wallpieces" type="int" max="9999" gui-text="wallpieces" gui-description="number of pieces for outer wall (0 for one per side)">0</param>
+<param name="top" type="optiongroup" appearance="combo" gui-text="top" gui-description="style of the top and lid">
+<option value="closed">closed</option>
+<option value="hole">hole</option>
+<option value="lid">lid</option>
+    </param>
+</page>
+<page name="tab_1" gui-text="Default"><param name="thickness" type="float" precision="2" max="9999" gui-text="thickness" gui-description="thickness of the material (in mm) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#thickness)">3.0</param>
+<param name="tabs" type="float" precision="2" max="9999" gui-text="tabs" gui-description="width of tabs holding the parts in place (in mm)(not supported everywhere) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#tabs)">0.0</param>
+<param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
+<param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
+<param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
+<param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
+<option value="loop">loop</option>
+<option value="corner">corner</option>
+<option value="backarc">backarc</option>
+    </param>
+<param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
+</page>
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<option value="rectangular">rectangular</option>
+<option value="springs">springs</option>
+<option value="barbs">barbs</option>
+<option value="snap">snap</option>
+    </param>
+<param name="FingerJoint_surroundingspaces" type="float" precision="2" max="9999" gui-text="surroundingspaces" gui-description="space at the start and end in multiple of normal spaces">2.0</param>
+<param name="FingerJoint_bottom_lip" type="float" precision="2" max="9999" gui-text="bottom_lip" gui-description="height of the bottom lips sticking out  (multiples of thickness) FingerHoleEdge only!">0.0</param>
+<param name="FingerJoint_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
+<param name="FingerJoint_extra_length" type="float" precision="2" max="9999" gui-text="extra_length" gui-description="extra material to grind away burn marks (multiples of thickness)">0.0</param>
+<param name="FingerJoint_finger" type="float" precision="2" max="9999" gui-text="finger" gui-description="width of the fingers (multiples of thickness)">2.0</param>
+<param name="FingerJoint_play" type="float" precision="2" max="9999" gui-text="play" gui-description="extra space to allow finger move in and out (multiples of thickness)">0.0</param>
+<param name="FingerJoint_space" type="float" precision="2" max="9999" gui-text="space" gui-description="space between fingers (multiples of thickness)">2.0</param>
+<param name="FingerJoint_width" type="float" precision="2" max="9999" gui-text="width" gui-description="width of finger holes (multiples of thickness)">1.0</param>
+</page>
+<page name="tab_3" gui-text="Dove Tail Joints"><param name="DoveTail_angle" type="int" max="9999" gui-text="angle" gui-description="how much should fingers widen (-80 to 80)">50</param>
+<param name="DoveTail_depth" type="float" precision="2" max="9999" gui-text="depth" gui-description="how far the dove tails stick out of/into the edge (multiples of thickness)">1.5</param>
+<param name="DoveTail_radius" type="float" precision="2" max="9999" gui-text="radius" gui-description="radius used on all four corners (multiples of thickness)">0.2</param>
+<param name="DoveTail_size" type="int" max="9999" gui-text="size" gui-description="from one middle of a dove tail to another (multiples of thickness)">3</param>
+</page>
+<page name="tab_4" gui-text="Flex"><param name="Flex_stretch" type="float" precision="2" max="9999" gui-text="stretch" gui-description="Hint of how much the flex part should be shortened">1.05</param>
+<param name="Flex_connection" type="float" precision="2" max="9999" gui-text="connection" gui-description="width of the gaps in the cuts (multiples of thickness)">1.0</param>
+<param name="Flex_distance" type="float" precision="2" max="9999" gui-text="distance" gui-description="width of the pattern perpendicular to the cuts (multiples of thickness)">0.5</param>
+<param name="Flex_width" type="float" precision="2" max="9999" gui-text="width" gui-description="width of the pattern in direction of the cuts (multiples of thickness)">5.0</param>
+</page>
+<page name="tab_5" gui-text="Example">
+<image>./RoundedRegularBox-thumb.jpg</image>
+</page>
+</param>
+<label appearance="url">https://www.festi.info/boxes.py/RoundedRegularBox</label>
+<effect>
+    <object-type>all</object-type>
+    <effects-menu>
+        <submenu name="FabLab Chemnitz Boxes.py">
+            <submenu name="Boxes with flex"/>
+        </submenu>
+    </effects-menu>
+</effect>
+<script>
+    <command location="inx" interpreter="python">boxes_proxy.py</command>
+</script>
+</inkscape-extension>
\ No newline at end of file
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.RoyalGame.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.RoyalGame.inx
index 43352cd..4401fc6 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.RoyalGame.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.RoyalGame.inx
@@ -10,7 +10,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -18,8 +18,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.SBCMicroRack.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.SBCMicroRack.inx
index 4ad25a8..20bd72d 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.SBCMicroRack.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.SBCMicroRack.inx
@@ -23,7 +23,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -31,8 +31,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.SevenSegmentClock.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.SevenSegmentClock.inx
index 8866b41..1add5cb 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.SevenSegmentClock.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.SevenSegmentClock.inx
@@ -12,7 +12,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -20,8 +20,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.SevenSegmentPattern.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.SevenSegmentPattern.inx
index 1949682..deacd5c 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.SevenSegmentPattern.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.SevenSegmentPattern.inx
@@ -11,7 +11,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -19,8 +19,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Shadowbox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Shadowbox.inx
index 9056331..6e34ea8 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Shadowbox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Shadowbox.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -24,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Shoe.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Shoe.inx
index fb13e4d..b6070e9 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Shoe.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Shoe.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -24,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.ShutterBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.ShutterBox.inx
index 6c61b39..a7483d3 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.ShutterBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.ShutterBox.inx
@@ -3,8 +3,8 @@
 <name>ShutterBox</name>
 <id>info.festi.boxes.py.ShutterBox</id>
 <param name="generator" type="string" gui-hidden="true">shutterbox</param>
-<param name="tab" type="notebook"><page name="tab_0" gui-text="ShutterBox"><param name="x" type="float" precision="2" max="9999" gui-text="x" gui-description="inner width in mm">150</param>
-<param name="y" type="float" precision="2" max="9999" gui-text="y" gui-description="inner depth in mm">100</param>
+<param name="tab" type="notebook"><page name="tab_0" gui-text="ShutterBox"><param name="x" type="float" precision="2" max="9999" gui-text="x" gui-description="inner width in mm">100</param>
+<param name="y" type="float" precision="2" max="9999" gui-text="y" gui-description="inner depth in mm">150</param>
 <param name="h" type="float" precision="2" max="9999" gui-text="h" gui-description="inner height in mm">100</param>
 <param name="radius" type="float" precision="2" max="9999" gui-text="radius" gui-description="radius of the corners">40.0</param>
 <param name="style" type="optiongroup" appearance="combo" gui-text="style" gui-description="Number of rounded top corners">
@@ -17,7 +17,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -25,8 +25,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.SideDoorHousing.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.SideDoorHousing.inx
index 2ad8dce..064dee0 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.SideDoorHousing.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.SideDoorHousing.inx
@@ -19,7 +19,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -27,8 +27,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.SideHingeBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.SideHingeBox.inx
new file mode 100644
index 0000000..844a68e
--- /dev/null
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.SideHingeBox.inx
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+<name>SideHingeBox</name>
+<id>info.festi.boxes.py.SideHingeBox</id>
+<param name="generator" type="string" gui-hidden="true">sidehingebox</param>
+<param name="tab" type="notebook"><page name="tab_0" gui-text="SideHingeBox"><param name="x" type="float" precision="2" max="9999" gui-text="x" gui-description="inner width in mm (unless outside selected)">100.0</param>
+<param name="y" type="float" precision="2" max="9999" gui-text="y" gui-description="inner depth in mm (unless outside selected)">100.0</param>
+<param name="h" type="float" precision="2" max="9999" gui-text="h" gui-description="inner height in mm (unless outside selected)">100.0</param>
+<param name="outside" type="bool" gui-text="outside" gui-description="treat sizes as outside measurements [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#outside)">true</param>
+<param name="play" type="float" precision="2" max="9999" gui-text="play" gui-description="play between the two sides as multiple of the wall thickness">0.15</param>
+<param name="hinge_center" type="float" precision="2" max="9999" gui-text="hinge_center" gui-description="distance between the hinge center and adjacent sides (0.0 for default)">0.0</param>
+<param name="hinge_radius" type="float" precision="2" max="9999" gui-text="hinge_radius" gui-description="radius of the hinge inner circle">5.5</param>
+<param name="cherrymx_latches" type="optiongroup" appearance="combo" gui-text="cherrymx_latches" gui-description="add one or two latches, based on 3D printing and a cherry mx compatible mechanical keyboard switch">
+<option value="0">0</option>
+<option value="1">1</option>
+<option value="2">2</option>
+    </param>
+</page>
+<page name="tab_1" gui-text="Default"><param name="thickness" type="float" precision="2" max="9999" gui-text="thickness" gui-description="thickness of the material (in mm) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#thickness)">3.0</param>
+<param name="tabs" type="float" precision="2" max="9999" gui-text="tabs" gui-description="width of tabs holding the parts in place (in mm)(not supported everywhere) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#tabs)">0.0</param>
+<param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
+<param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
+<param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
+<param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
+<option value="loop">loop</option>
+<option value="corner">corner</option>
+<option value="backarc">backarc</option>
+    </param>
+<param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
+</page>
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<option value="rectangular">rectangular</option>
+<option value="springs">springs</option>
+<option value="barbs">barbs</option>
+<option value="snap">snap</option>
+    </param>
+<param name="FingerJoint_surroundingspaces" type="float" precision="2" max="9999" gui-text="surroundingspaces" gui-description="space at the start and end in multiple of normal spaces">2.0</param>
+<param name="FingerJoint_bottom_lip" type="float" precision="2" max="9999" gui-text="bottom_lip" gui-description="height of the bottom lips sticking out  (multiples of thickness) FingerHoleEdge only!">0.0</param>
+<param name="FingerJoint_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
+<param name="FingerJoint_extra_length" type="float" precision="2" max="9999" gui-text="extra_length" gui-description="extra material to grind away burn marks (multiples of thickness)">0.0</param>
+<param name="FingerJoint_finger" type="float" precision="2" max="9999" gui-text="finger" gui-description="width of the fingers (multiples of thickness)">2.0</param>
+<param name="FingerJoint_play" type="float" precision="2" max="9999" gui-text="play" gui-description="extra space to allow finger move in and out (multiples of thickness)">0.0</param>
+<param name="FingerJoint_space" type="float" precision="2" max="9999" gui-text="space" gui-description="space between fingers (multiples of thickness)">2.0</param>
+<param name="FingerJoint_width" type="float" precision="2" max="9999" gui-text="width" gui-description="width of finger holes (multiples of thickness)">1.0</param>
+</page>
+<page name="tab_3" gui-text="Example">
+<image>./SideHingeBox-thumb.jpg</image>
+</page>
+</param>
+<label appearance="url">https://www.festi.info/boxes.py/SideHingeBox</label>
+<effect>
+    <object-type>all</object-type>
+    <effects-menu>
+        <submenu name="FabLab Chemnitz Boxes.py">
+            <submenu name="Boxes"/>
+        </submenu>
+    </effects-menu>
+</effect>
+<script>
+    <command location="inx" interpreter="python">boxes_proxy.py</command>
+</script>
+</inkscape-extension>
\ No newline at end of file
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Silverware.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Silverware.inx
index 840a437..3e308a2 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Silverware.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Silverware.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.SkadisBoard.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.SkadisBoard.inx
index c06bcf8..9e5c124 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.SkadisBoard.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.SkadisBoard.inx
@@ -11,7 +11,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.SlantedTray.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.SlantedTray.inx
index d78ded8..5f320b7 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.SlantedTray.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.SlantedTray.inx
@@ -14,7 +14,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -22,8 +22,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.SlidingDrawer.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.SlidingDrawer.inx
index 7e8eac0..7f1a52e 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.SlidingDrawer.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.SlidingDrawer.inx
@@ -14,7 +14,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -22,8 +22,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.SmallPartsTray.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.SmallPartsTray.inx
index 689d0c5..982bb6d 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.SmallPartsTray.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.SmallPartsTray.inx
@@ -17,7 +17,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -25,8 +25,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.SmallPartsTray2.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.SmallPartsTray2.inx
index e745971..ad4e207 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.SmallPartsTray2.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.SmallPartsTray2.inx
@@ -17,7 +17,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -25,8 +25,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -69,8 +68,7 @@
 <param name="CabinetHinge_play" type="float" precision="2" max="9999" gui-text="play" gui-description="space between eyes (multiples of thickness)">0.05</param>
 <param name="CabinetHinge_spacing" type="float" precision="2" max="9999" gui-text="spacing" gui-description="minimum space around the hinge (multiples of thickness)">2.0</param>
 </page>
-<page name="tab_6" gui-text="Slide-on Lids"><param name="SlideOnLid_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="SlideOnLid_hole_width" type="int" max="9999" gui-text="hole_width" gui-description='width of the "finger hole" in mm'>0</param>
+<page name="tab_6" gui-text="Slide-on Lids"><param name="SlideOnLid_hole_width" type="int" max="9999" gui-text="hole_width" gui-description='width of the "finger hole" in mm'>0</param>
 <param name="SlideOnLid_second_pin" type="bool" gui-text="second_pin" gui-description="additional pin for better positioning">true</param>
 <param name="SlideOnLid_spring" type="optiongroup" appearance="combo" gui-text="spring" gui-description="position(s) of the extra locking springs in the lid">
 <option value="both">both</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.SpicesRack.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.SpicesRack.inx
index 335b830..54e213f 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.SpicesRack.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.SpicesRack.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -24,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Spool.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Spool.inx
index c145f21..2bd5a16 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Spool.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Spool.inx
@@ -16,7 +16,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -24,8 +24,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Stachel.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Stachel.inx
index f0c80c2..5d86923 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Stachel.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Stachel.inx
@@ -12,7 +12,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.StackableBin.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.StackableBin.inx
new file mode 100644
index 0000000..f731c75
--- /dev/null
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.StackableBin.inx
@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+<name>StackableBin</name>
+<id>info.festi.boxes.py.StackableBin</id>
+<param name="generator" type="string" gui-hidden="true">stackablebin</param>
+<param name="tab" type="notebook"><page name="tab_0" gui-text="StackableBin"><param name="outside" type="bool" gui-text="outside" gui-description="treat sizes as outside measurements [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#outside)">true</param>
+<param name="x" type="float" precision="2" max="9999" gui-text="x" gui-description="inner width in mm">70</param>
+<param name="h" type="float" precision="2" max="9999" gui-text="h" gui-description="inner height in mm">50</param>
+<param name="d" type="float" precision="2" max="9999" gui-text="d" gui-description="bin (d)epth">100</param>
+<param name="front" type="float" precision="2" max="9999" gui-text="front" gui-description="fraction of bin height covered with slope">0.4</param>
+</page>
+<page name="tab_1" gui-text="Default"><param name="thickness" type="float" precision="2" max="9999" gui-text="thickness" gui-description="thickness of the material (in mm) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#thickness)">3.0</param>
+<param name="tabs" type="float" precision="2" max="9999" gui-text="tabs" gui-description="width of tabs holding the parts in place (in mm)(not supported everywhere) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#tabs)">0.0</param>
+<param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
+<param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
+<param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
+<param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
+<option value="loop">loop</option>
+<option value="corner">corner</option>
+<option value="backarc">backarc</option>
+    </param>
+<param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
+</page>
+<page name="tab_2" gui-text="Stackable Edges"><param name="Stackable_angle" type="int" max="9999" gui-text="angle" gui-description="inside angle of the feet">60</param>
+<param name="Stackable_bottom_stabilizers" type="float" precision="2" max="9999" gui-text="bottom_stabilizers" gui-description="height of strips to be glued to the inside of bottom edges (multiples of thickness)">2.4</param>
+<param name="Stackable_height" type="float" precision="2" max="9999" gui-text="height" gui-description="height of the feet (multiples of thickness)">2.0</param>
+<param name="Stackable_holedistance" type="float" precision="2" max="9999" gui-text="holedistance" gui-description="distance from finger holes to bottom edge (multiples of thickness)">1.0</param>
+<param name="Stackable_width" type="float" precision="2" max="9999" gui-text="width" gui-description="width of the feet (multiples of thickness)">4.0</param>
+</page>
+<page name="tab_3" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<option value="rectangular">rectangular</option>
+<option value="springs">springs</option>
+<option value="barbs">barbs</option>
+<option value="snap">snap</option>
+    </param>
+<param name="FingerJoint_surroundingspaces" type="float" precision="2" max="9999" gui-text="surroundingspaces" gui-description="space at the start and end in multiple of normal spaces">0.5</param>
+<param name="FingerJoint_bottom_lip" type="float" precision="2" max="9999" gui-text="bottom_lip" gui-description="height of the bottom lips sticking out  (multiples of thickness) FingerHoleEdge only!">0.0</param>
+<param name="FingerJoint_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
+<param name="FingerJoint_extra_length" type="float" precision="2" max="9999" gui-text="extra_length" gui-description="extra material to grind away burn marks (multiples of thickness)">0.0</param>
+<param name="FingerJoint_finger" type="float" precision="2" max="9999" gui-text="finger" gui-description="width of the fingers (multiples of thickness)">2.0</param>
+<param name="FingerJoint_play" type="float" precision="2" max="9999" gui-text="play" gui-description="extra space to allow finger move in and out (multiples of thickness)">0.0</param>
+<param name="FingerJoint_space" type="float" precision="2" max="9999" gui-text="space" gui-description="space between fingers (multiples of thickness)">2.0</param>
+<param name="FingerJoint_width" type="float" precision="2" max="9999" gui-text="width" gui-description="width of finger holes (multiples of thickness)">1.0</param>
+</page>
+<page name="tab_4" gui-text="Example">
+<image>./StackableBin-thumb.jpg</image>
+</page>
+</param>
+<label appearance="url">https://www.festi.info/boxes.py/StackableBin</label>
+<effect>
+    <object-type>all</object-type>
+    <effects-menu>
+        <submenu name="FabLab Chemnitz Boxes.py">
+            <submenu name="Shelves"/>
+        </submenu>
+    </effects-menu>
+</effect>
+<script>
+    <command location="inx" interpreter="python">boxes_proxy.py</command>
+</script>
+</inkscape-extension>
\ No newline at end of file
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.StorageRack.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.StorageRack.inx
index afa3102..5fadd50 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.StorageRack.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.StorageRack.inx
@@ -27,7 +27,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -35,8 +35,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.StorageShelf.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.StorageShelf.inx
index 0e8e7ed..06909e4 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.StorageShelf.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.StorageShelf.inx
@@ -39,7 +39,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -47,8 +47,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -91,8 +90,7 @@
 <param name="CabinetHinge_play" type="float" precision="2" max="9999" gui-text="play" gui-description="space between eyes (multiples of thickness)">0.05</param>
 <param name="CabinetHinge_spacing" type="float" precision="2" max="9999" gui-text="spacing" gui-description="minimum space around the hinge (multiples of thickness)">2.0</param>
 </page>
-<page name="tab_6" gui-text="Slide-on Lids"><param name="SlideOnLid_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="SlideOnLid_hole_width" type="int" max="9999" gui-text="hole_width" gui-description='width of the "finger hole" in mm'>0</param>
+<page name="tab_6" gui-text="Slide-on Lids"><param name="SlideOnLid_hole_width" type="int" max="9999" gui-text="hole_width" gui-description='width of the "finger hole" in mm'>0</param>
 <param name="SlideOnLid_second_pin" type="bool" gui-text="second_pin" gui-description="additional pin for better positioning">true</param>
 <param name="SlideOnLid_spring" type="optiongroup" appearance="combo" gui-text="spring" gui-description="position(s) of the extra locking springs in the lid">
 <option value="both">both</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.Tetris.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.Tetris.inx
index c91700a..bb295d8 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.Tetris.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.Tetris.inx
@@ -17,7 +17,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -25,8 +25,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.TrafficLight.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.TrafficLight.inx
index d91631a..6674323 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.TrafficLight.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.TrafficLight.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -23,8 +23,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.TrayInsert.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.TrayInsert.inx
index dd160d7..84ff438 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.TrayInsert.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.TrayInsert.inx
@@ -13,7 +13,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.TriangleLamp.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.TriangleLamp.inx
index 7836fdc..75db2d3 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.TriangleLamp.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.TriangleLamp.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -23,8 +23,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.TwoPiece.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.TwoPiece.inx
index 36cb1af..eb0bd54 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.TwoPiece.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.TwoPiece.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -23,8 +23,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.TypeTray.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.TypeTray.inx
index 4abe883..5ef5f4f 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.TypeTray.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.TypeTray.inx
@@ -50,7 +50,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -58,8 +58,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -102,8 +101,7 @@
 <param name="CabinetHinge_play" type="float" precision="2" max="9999" gui-text="play" gui-description="space between eyes (multiples of thickness)">0.05</param>
 <param name="CabinetHinge_spacing" type="float" precision="2" max="9999" gui-text="spacing" gui-description="minimum space around the hinge (multiples of thickness)">2.0</param>
 </page>
-<page name="tab_6" gui-text="Slide-on Lids"><param name="SlideOnLid_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="SlideOnLid_hole_width" type="int" max="9999" gui-text="hole_width" gui-description='width of the "finger hole" in mm'>0</param>
+<page name="tab_6" gui-text="Slide-on Lids"><param name="SlideOnLid_hole_width" type="int" max="9999" gui-text="hole_width" gui-description='width of the "finger hole" in mm'>0</param>
 <param name="SlideOnLid_second_pin" type="bool" gui-text="second_pin" gui-description="additional pin for better positioning">true</param>
 <param name="SlideOnLid_spring" type="optiongroup" appearance="combo" gui-text="spring" gui-description="position(s) of the extra locking springs in the lid">
 <option value="both">both</option>
@@ -185,7 +183,7 @@
 <param name="text_distance_x" type="float" precision="2" max="9999" gui-text="text_distance_x" gui-description="Distance in X from edge of tray in mm. Has no effect when text is centered.">2.0</param>
 <param name="text_distance_y" type="float" precision="2" max="9999" gui-text="text_distance_y" gui-description="Distance in Y from edge of tray in mm.">2.0</param>
 <param name="text_at_front" type="bool" gui-text="text_at_front" gui-description="Start compartement labels on the front">false</param>
-<param name="label_file" type="string" gui-text="label_file" gui-description="file with compartment labels. One line per compartment">labels.txt</param>
+<param name="label_file" type="path" mode="file" gui-text="label_file" gui-description="file with compartment labels. One line per compartment">None</param>
 </page>
 <page name="tab_13" gui-text="FingerHoleEdge"><param name="FingerHoleEdge_absolute_depth" type="float" precision="2" max="9999" gui-text="absolute_depth" gui-description="depth of the hole in mm (in addition to the relative)">0.0</param>
 <param name="FingerHoleEdge_absolute_width" type="float" precision="2" max="9999" gui-text="absolute_width" gui-description="width of the hole in mm (in addition to the relative)">0.0</param>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.UBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.UBox.inx
index ddaddd1..515725f 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.UBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.UBox.inx
@@ -31,7 +31,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -39,8 +39,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -83,8 +82,7 @@
 <param name="CabinetHinge_play" type="float" precision="2" max="9999" gui-text="play" gui-description="space between eyes (multiples of thickness)">0.05</param>
 <param name="CabinetHinge_spacing" type="float" precision="2" max="9999" gui-text="spacing" gui-description="minimum space around the hinge (multiples of thickness)">2.0</param>
 </page>
-<page name="tab_6" gui-text="Slide-on Lids"><param name="SlideOnLid_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="SlideOnLid_hole_width" type="int" max="9999" gui-text="hole_width" gui-description='width of the "finger hole" in mm'>0</param>
+<page name="tab_6" gui-text="Slide-on Lids"><param name="SlideOnLid_hole_width" type="int" max="9999" gui-text="hole_width" gui-description='width of the "finger hole" in mm'>0</param>
 <param name="SlideOnLid_second_pin" type="bool" gui-text="second_pin" gui-description="additional pin for better positioning">true</param>
 <param name="SlideOnLid_spring" type="optiongroup" appearance="combo" gui-text="spring" gui-description="position(s) of the extra locking springs in the lid">
 <option value="both">both</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.UnevenHeightBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.UnevenHeightBox.inx
index bf3921a..3eefc89 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.UnevenHeightBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.UnevenHeightBox.inx
@@ -25,7 +25,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -33,8 +33,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.UniversalBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.UniversalBox.inx
index 01608d7..639ad64 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.UniversalBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.UniversalBox.inx
@@ -41,7 +41,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -49,8 +49,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -93,8 +92,7 @@
 <param name="CabinetHinge_play" type="float" precision="2" max="9999" gui-text="play" gui-description="space between eyes (multiples of thickness)">0.05</param>
 <param name="CabinetHinge_spacing" type="float" precision="2" max="9999" gui-text="spacing" gui-description="minimum space around the hinge (multiples of thickness)">2.0</param>
 </page>
-<page name="tab_6" gui-text="Slide-on Lids"><param name="SlideOnLid_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="SlideOnLid_hole_width" type="int" max="9999" gui-text="hole_width" gui-description='width of the "finger hole" in mm'>0</param>
+<page name="tab_6" gui-text="Slide-on Lids"><param name="SlideOnLid_hole_width" type="int" max="9999" gui-text="hole_width" gui-description='width of the "finger hole" in mm'>0</param>
 <param name="SlideOnLid_second_pin" type="bool" gui-text="second_pin" gui-description="additional pin for better positioning">true</param>
 <param name="SlideOnLid_spring" type="optiongroup" appearance="combo" gui-text="spring" gui-description="position(s) of the extra locking springs in the lid">
 <option value="both">both</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WallCaliper.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WallCaliper.inx
index 87f263f..14b5168 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WallCaliper.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WallCaliper.inx
@@ -19,7 +19,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -27,8 +27,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -67,7 +66,7 @@
 <param name="DinRail_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
 </page>
 <page name="tab_6" gui-text="FrenchCleatEdges"><param name="FrenchCleat_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of the cut (0 for horizontal)">45.0</param>
-<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud", "hook" or "none"'>
+<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud" to brace against the wall, "hook" for attaching to a second cleat or "none" for just straight'>
 <option value="stud">stud</option>
 <option value="hook">hook</option>
 <option value="none">none</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WallChiselHolder.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WallChiselHolder.inx
index f8b705d..9f110c5 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WallChiselHolder.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WallChiselHolder.inx
@@ -27,7 +27,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -35,8 +35,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -75,7 +74,7 @@
 <param name="DinRail_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
 </page>
 <page name="tab_6" gui-text="FrenchCleatEdges"><param name="FrenchCleat_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of the cut (0 for horizontal)">45.0</param>
-<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud", "hook" or "none"'>
+<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud" to brace against the wall, "hook" for attaching to a second cleat or "none" for just straight'>
 <option value="stud">stud</option>
 <option value="hook">hook</option>
 <option value="none">none</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WallConsole.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WallConsole.inx
index c7a55ea..5620a7b 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WallConsole.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WallConsole.inx
@@ -21,7 +21,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -29,8 +29,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -69,7 +68,7 @@
 <param name="DinRail_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
 </page>
 <page name="tab_6" gui-text="FrenchCleatEdges"><param name="FrenchCleat_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of the cut (0 for horizontal)">45.0</param>
-<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud", "hook" or "none"'>
+<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud" to brace against the wall, "hook" for attaching to a second cleat or "none" for just straight'>
 <option value="stud">stud</option>
 <option value="hook">hook</option>
 <option value="none">none</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WallDrillBox.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WallDrillBox.inx
index cecc729..a82ead4 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WallDrillBox.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WallDrillBox.inx
@@ -20,7 +20,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -28,8 +28,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -68,7 +67,7 @@
 <param name="DinRail_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
 </page>
 <page name="tab_6" gui-text="FrenchCleatEdges"><param name="FrenchCleat_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of the cut (0 for horizontal)">45.0</param>
-<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud", "hook" or "none"'>
+<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud" to brace against the wall, "hook" for attaching to a second cleat or "none" for just straight'>
 <option value="stud">stud</option>
 <option value="hook">hook</option>
 <option value="none">none</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WallEdges.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WallEdges.inx
index 6e14046..11046bd 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WallEdges.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WallEdges.inx
@@ -17,7 +17,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -25,8 +25,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -65,7 +64,7 @@
 <param name="DinRail_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
 </page>
 <page name="tab_6" gui-text="FrenchCleatEdges"><param name="FrenchCleat_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of the cut (0 for horizontal)">45.0</param>
-<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud", "hook" or "none"'>
+<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud" to brace against the wall, "hook" for attaching to a second cleat or "none" for just straight'>
 <option value="stud">stud</option>
 <option value="hook">hook</option>
 <option value="none">none</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WallPinRow.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WallPinRow.inx
index bf073a7..6b56300 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WallPinRow.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WallPinRow.inx
@@ -24,7 +24,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -32,8 +32,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -72,7 +71,7 @@
 <param name="DinRail_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
 </page>
 <page name="tab_6" gui-text="FrenchCleatEdges"><param name="FrenchCleat_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of the cut (0 for horizontal)">45.0</param>
-<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud", "hook" or "none"'>
+<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud" to brace against the wall, "hook" for attaching to a second cleat or "none" for just straight'>
 <option value="stud">stud</option>
 <option value="hook">hook</option>
 <option value="none">none</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WallPlaneHolder.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WallPlaneHolder.inx
index 747b46e..1125775 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WallPlaneHolder.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WallPlaneHolder.inx
@@ -20,7 +20,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -28,8 +28,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -68,7 +67,7 @@
 <param name="DinRail_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
 </page>
 <page name="tab_6" gui-text="FrenchCleatEdges"><param name="FrenchCleat_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of the cut (0 for horizontal)">45.0</param>
-<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud", "hook" or "none"'>
+<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud" to brace against the wall, "hook" for attaching to a second cleat or "none" for just straight'>
 <option value="stud">stud</option>
 <option value="hook">hook</option>
 <option value="none">none</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WallPliersHolder.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WallPliersHolder.inx
index 9b9170d..cd531b7 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WallPliersHolder.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WallPliersHolder.inx
@@ -21,7 +21,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -29,8 +29,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -69,7 +68,7 @@
 <param name="DinRail_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
 </page>
 <page name="tab_6" gui-text="FrenchCleatEdges"><param name="FrenchCleat_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of the cut (0 for horizontal)">45.0</param>
-<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud", "hook" or "none"'>
+<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud" to brace against the wall, "hook" for attaching to a second cleat or "none" for just straight'>
 <option value="stud">stud</option>
 <option value="hook">hook</option>
 <option value="none">none</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WallRack.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WallRack.inx
index ed77827..6e102a3 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WallRack.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WallRack.inx
@@ -16,7 +16,7 @@
 <param name="full_height_top" type="bool" gui-text="full_height_top" gui-description="Add full height of topmost rack to the back panel">true</param>
 <param name="wall_height" type="float" precision="2" max="9999" gui-text="wall_height" gui-description="height of walls">20.0</param>
 <param name="back_height" type="float" precision="2" max="9999" gui-text="back_height" gui-description="height of the back as fraction of the front height">1.5</param>
-        <param name="side_edges" type="optiongroup" appearance="combo" gui-text="side_edges" gui-description="edge type holding the shelfs together">
+        <param name="side_edges" type="optiongroup" appearance="combo" gui-text="side_edges" gui-description="edge type holding the shelves together">
             <option value="F">F Finger Joint (opposing side)</option>
             <option value="h">h Edge (parallel Finger Joint Holes)</option>
       </param>
@@ -27,7 +27,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -35,8 +35,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WallRollHolder.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WallRollHolder.inx
index 0ea10b5..565e4f0 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WallRollHolder.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WallRollHolder.inx
@@ -20,7 +20,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -28,8 +28,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -68,7 +67,7 @@
 <param name="DinRail_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
 </page>
 <page name="tab_6" gui-text="FrenchCleatEdges"><param name="FrenchCleat_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of the cut (0 for horizontal)">45.0</param>
-<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud", "hook" or "none"'>
+<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud" to brace against the wall, "hook" for attaching to a second cleat or "none" for just straight'>
 <option value="stud">stud</option>
 <option value="hook">hook</option>
 <option value="none">none</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WallSlottedHolder.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WallSlottedHolder.inx
index 264058b..fb46877 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WallSlottedHolder.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WallSlottedHolder.inx
@@ -28,7 +28,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -36,8 +36,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -76,7 +75,7 @@
 <param name="DinRail_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
 </page>
 <page name="tab_6" gui-text="FrenchCleatEdges"><param name="FrenchCleat_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of the cut (0 for horizontal)">45.0</param>
-<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud", "hook" or "none"'>
+<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud" to brace against the wall, "hook" for attaching to a second cleat or "none" for just straight'>
 <option value="stud">stud</option>
 <option value="hook">hook</option>
 <option value="none">none</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WallStairs.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WallStairs.inx
index 3257240..cd310e7 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WallStairs.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WallStairs.inx
@@ -20,7 +20,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -28,8 +28,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -68,7 +67,7 @@
 <param name="DinRail_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
 </page>
 <page name="tab_6" gui-text="FrenchCleatEdges"><param name="FrenchCleat_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of the cut (0 for horizontal)">45.0</param>
-<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud", "hook" or "none"'>
+<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud" to brace against the wall, "hook" for attaching to a second cleat or "none" for just straight'>
 <option value="stud">stud</option>
 <option value="hook">hook</option>
 <option value="none">none</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WallTypeTray.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WallTypeTray.inx
index a2090ef..0d61f61 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WallTypeTray.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WallTypeTray.inx
@@ -29,7 +29,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -37,8 +37,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -77,7 +76,7 @@
 <param name="DinRail_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
 </page>
 <page name="tab_6" gui-text="FrenchCleatEdges"><param name="FrenchCleat_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of the cut (0 for horizontal)">45.0</param>
-<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud", "hook" or "none"'>
+<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud" to brace against the wall, "hook" for attaching to a second cleat or "none" for just straight'>
 <option value="stud">stud</option>
 <option value="hook">hook</option>
 <option value="none">none</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WallWrenchHolder.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WallWrenchHolder.inx
index f2f2132..0e6d182 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WallWrenchHolder.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WallWrenchHolder.inx
@@ -24,7 +24,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -32,8 +32,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
@@ -72,7 +71,7 @@
 <param name="DinRail_edge_width" type="float" precision="2" max="9999" gui-text="edge_width" gui-description="space below holes of FingerHoleEdge (multiples of thickness)">1.0</param>
 </page>
 <page name="tab_6" gui-text="FrenchCleatEdges"><param name="FrenchCleat_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle of the cut (0 for horizontal)">45.0</param>
-<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud", "hook" or "none"'>
+<param name="FrenchCleat_bottom" type="optiongroup" appearance="combo" gui-text="bottom" gui-description='"stud" to brace against the wall, "hook" for attaching to a second cleat or "none" for just straight'>
 <option value="stud">stud</option>
 <option value="hook">hook</option>
 <option value="none">none</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WavyKnob.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WavyKnob.inx
index 8875768..f723c3e 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WavyKnob.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WavyKnob.inx
@@ -15,7 +15,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes.py.WineRack.inx b/extensions/fablabchemnitz/boxes.py/boxes.py.WineRack.inx
index c85f078..cc70e59 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes.py.WineRack.inx
+++ b/extensions/fablabchemnitz/boxes.py/boxes.py.WineRack.inx
@@ -18,7 +18,7 @@
 <param name="qr_code" type="bool" gui-text="qr_code" gui-description="Add a QR Code with link or command line to the generated output">false</param>
 <param name="debug" type="bool" gui-text="debug" gui-description="print surrounding boxes for some structures [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#debug)">false</param>
 <param name="labels" type="bool" gui-text="labels" gui-description="label the parts (where available)">true</param>
-<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100</param>
+<param name="reference" type="float" precision="2" max="9999" gui-text="reference" gui-description="print reference rectangle with given length (in mm)(zero to disable) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#reference)">100.0</param>
 <param name="inner_corners" type="optiongroup" appearance="combo" gui-text="inner_corners" gui-description="style for inner corners [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#inner-corners)">
 <option value="loop">loop</option>
 <option value="corner">corner</option>
@@ -26,8 +26,7 @@
     </param>
 <param name="burn" type="float" precision="2" max="9999" gui-text="burn" gui-description="burn correction (in mm)(bigger values for tighter fit) [🛈](https://florianfesti.github.io/boxes/html/usermanual.html#burn)">0.1</param>
 </page>
-<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_angle" type="float" precision="2" max="9999" gui-text="angle" gui-description="angle">90.0</param>
-<param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
+<page name="tab_2" gui-text="Finger Joints"><param name="FingerJoint_style" type="optiongroup" appearance="combo" gui-text="style" gui-description="style of the fingers">
 <option value="rectangular">rectangular</option>
 <option value="springs">springs</option>
 <option value="barbs">barbs</option>
diff --git a/extensions/fablabchemnitz/boxes.py/boxes/boxes/generators/typetray.py b/extensions/fablabchemnitz/boxes.py/boxes/boxes/generators/typetray.py
index 80fd701..e520de5 100644
--- a/extensions/fablabchemnitz/boxes.py/boxes/boxes/generators/typetray.py
+++ b/extensions/fablabchemnitz/boxes.py/boxes/boxes/generators/typetray.py
@@ -237,8 +237,7 @@ class TypeTray(_TopEdge):
         if hasattr(self, "label_text"):
             self.textcontent = self.label_text.split("\r\n")
         else:
-            with open(self.label_file) as f:
-                self.textcontent = f.readlines()
+            self.textcontent = self.label_file.readlines()
         self.textnumber = 0
 
         # x sides
diff --git a/extensions/fablabchemnitz/boxes.py/boxes/scripts/boxes2inkscape b/extensions/fablabchemnitz/boxes.py/boxes/scripts/boxes2inkscape
index f407193..d240765 100755
--- a/extensions/fablabchemnitz/boxes.py/boxes/scripts/boxes2inkscape
+++ b/extensions/fablabchemnitz/boxes.py/boxes/scripts/boxes2inkscape
@@ -64,6 +64,9 @@ class Boxes2INX:
                 t = '"bool"'
                 default = str(a.default).lower()
 
+            elif isinstance(a.type, argparse.FileType):
+                t = '"path" mode="file"'
+
             elif a.type is boxes.argparseSections:
                 t = '"string"'
 
@@ -72,7 +75,7 @@ class Boxes2INX:
                      float: '"float" precision="2"',
                      str: '"string"',
                      }.get(a.type, '"string"')
-
+                
             if t == '"int"' or t == '"float" precision="2"':
                 return f'''<param name="{name}" type={t} max="9999" gui-text="{viewname}" gui-description={quoteattr(a.help or viewname)}>{default}</param>\n'''