diff --git a/extensions/fablabchemnitz_filletchamfer.inx b/extensions/fablabchemnitz_filletchamfer.inx
index 004b434..85de844 100644
--- a/extensions/fablabchemnitz_filletchamfer.inx
+++ b/extensions/fablabchemnitz_filletchamfer.inx
@@ -8,7 +8,14 @@
         <_item value="fillet">Fillet</_item>
         <_item value="chamfer">Chamfer</_item>
     </param>
-    <param name="radius" type="float" min="0.0" max="1000.0" _gui-text="Radius (px):">20.0</param>
+    <param name="radius" type="float" min="0.0" max="1000.0" _gui-text="Radius:">5.0</param>
+    <param name="unit" _gui-text="Unit" type="enum">
+        <_item value="mm">mm</_item>
+        <_item value="cm">cm</_item>
+        <_item value="in">in</_item>
+        <_item value="px">px</_item>
+    </param>
+	<param name="remove" type="boolean" _gui-text="Remove control object">false</param>
     <effect>
         <object-type>all</object-type>
         <effects-menu>
diff --git a/extensions/fablabchemnitz_filletchamfer.py b/extensions/fablabchemnitz_filletchamfer.py
index f297fe8..3ea4292 100644
--- a/extensions/fablabchemnitz_filletchamfer.py
+++ b/extensions/fablabchemnitz_filletchamfer.py
@@ -168,6 +168,16 @@ class FilletChamfer(inkex.Effect):
                         action="store", type="float",
                         dest="radius", default=60.0,
                         help="The radius")
+        self.OptionParser.add_option('--unit',
+                        action='store',
+                        type='string', 
+                        dest='unit',
+                        default='px',
+                        help='units of measurement')
+        self.OptionParser.add_option("--remove",
+                        action="store", type="inkbool",
+                        dest="remove", default=False,
+                        help="If True, control object will be removed")
         
     def addEle(self, ele, parent, props):
         # https://inkscape.org/~pacogarcia/%E2%98%85new-version-of-shapes-extension
@@ -274,7 +284,7 @@ class FilletChamfer(inkex.Effect):
         return d_str(new_p, use_closed_attrib=True, rel=True)
 
     def effect(self):
-        self.options.radius = self.unittouu(str(self.options.radius) + 'px')
+        self.options.radius = self.unittouu(str(self.options.radius) + self.options.unit) 
         
         if self.options.radius == 0:
             return
@@ -289,6 +299,9 @@ class FilletChamfer(inkex.Effect):
                 attrib['d'] = self.add_fillet_to_path(attrib['d'])
                 self.addEle(inkex.addNS('path','svg'), node.getparent(), attrib)
 
+        if self.options.remove:
+            node.getparent().remove(node)
+				
 if __name__ == '__main__':
     e = FilletChamfer()
     e.affect()