diff --git a/examples/bffh.dhall b/examples/bffh.dhall
index 1c483b0..4ff8bb3 100644
--- a/examples/bffh.dhall
+++ b/examples/bffh.dhall
@@ -6,7 +6,10 @@
 , initiators = 
   { Initiator = { module = "Dummy", params = {=} } 
   }
-, listens = [{ address = "localhost", port = Some 59661 }]
+, listens = 
+  [ { address = "127.0.0.1", port = Some 59661 }
+  , { address = "::1", port = Some 59661 }
+  ]
 , machines = 
   { Testmachine = 
     { description = Some "A test machine"
diff --git a/src/api/machine.rs b/src/api/machine.rs
index 90b2ed5..983abe3 100644
--- a/src/api/machine.rs
+++ b/src/api/machine.rs
@@ -8,7 +8,7 @@ use crate::schema::api_capnp::State;
 use crate::schema::api_capnp::machine::*;
 use crate::connection::Session;
 use crate::db::Databases;
-use crate::db::machine::Status;
+use crate::db::machine::{Status, MachineState};
 use crate::machine::Machine as NwMachine;
 
 #[derive(Clone)]
@@ -45,16 +45,16 @@ impl Machine {
             Status::Disabled => {
                 builder.set_state(State::Disabled);
             }
-            Status::Blocked(_,_) => {
+            Status::Blocked(_) => {
                 builder.set_state(State::Blocked);
             }
-            Status::InUse(_,_) => {
+            Status::InUse(_) => {
                 builder.set_state(State::InUse);
             }
-            Status::ToCheck(_,_) => {
+            Status::ToCheck(_) => {
                 builder.set_state(State::ToCheck);
             }
-            Status::Reserved(_,_) => {
+            Status::Reserved(_) => {
                 builder.set_state(State::Reserved);
             }
         }
@@ -80,7 +80,23 @@ struct Write(Arc<Machine>);
 impl write::Server for Write {
     fn use_(&mut self,
         _params: write::UseParams,
-        _results: write::UseResults)
+        results: write::UseResults)
+    -> Promise<(), Error>
+    {
+        let uid = self.0.session.user.as_ref().map(|u| u.id.clone());
+        let new_state = MachineState::used(uid.clone());
+        if let Ok(tok) = self.0.machine.request_state_change(self.0.session.user.as_ref(), new_state) {
+            info!(self.0.session.log, "yay");
+        } else {
+            info!(self.0.session.log, "nay");
+        }
+
+        Promise::ok(())
+    }
+
+    fn reserve(&mut self,
+        _params: write::ReserveParams,
+        _results: write::ReserveResults)
     -> Promise<(), Error>
     {
         unimplemented!()
diff --git a/src/connection.rs b/src/connection.rs
index 7022c7d..2915c5e 100644
--- a/src/connection.rs
+++ b/src/connection.rs
@@ -26,8 +26,8 @@ use crate::network::Network;
 pub struct Session {
     // Session-spezific log
     pub log: Logger,
-    user: Option<User>,
-    accessdb: Arc<AccessControl>,
+    pub user: Option<User>,
+    pub accessdb: Arc<AccessControl>,
 }
 
 impl Session {
diff --git a/src/db/machine.rs b/src/db/machine.rs
index a243408..e28d66f 100644
--- a/src/db/machine.rs
+++ b/src/db/machine.rs
@@ -43,15 +43,15 @@ pub enum Status {
     /// Not currently used by anybody
     Free,
     /// Used by somebody
-    InUse(UserId, Priority),
+    InUse(Option<UserId>),
     /// Was used by somebody and now needs to be checked for cleanliness
-    ToCheck(UserId, Priority),
+    ToCheck(UserId),
     /// Not used by anybody but also can not be used. E.g. down for maintenance
-    Blocked(UserId, Priority),
+    Blocked(UserId),
     /// Disabled for some other reason
     Disabled,
     /// Reserved
-    Reserved(UserId, Priority),
+    Reserved(UserId),
 }
 
 pub fn uuid_from_api(uuid: crate::schema::api_capnp::u_u_i_d::Reader) -> Uuid {
@@ -83,24 +83,8 @@ impl MachineState {
         Self { state: Status::Free }
     }
 
-    pub fn used(uid: UserId, priority: Priority) -> Self {
-        Self { state: Status::InUse(uid, priority) }
-    }
-
-    /// Check if the given priority is higher than one's own.
-    ///
-    /// If `self` does not have a priority then this function always returns `true`
-    pub fn is_higher_priority(&self, priority: u64) -> bool {
-        match self.state {
-            Status::Disabled | Status::Free => { true },
-            Status::Blocked(_, self_prio) |
-            Status::InUse(_, self_prio) |
-            Status::ToCheck(_, self_prio) |
-            Status::Reserved(_, self_prio) =>
-            {
-                priority > self_prio
-            }
-        }
+    pub fn used(uid: Option<UserId>) -> Self {
+        Self { state: Status::InUse(uid) }
     }
 }
 
diff --git a/src/initiator.rs b/src/initiator.rs
index 94765f8..1e6264d 100644
--- a/src/initiator.rs
+++ b/src/initiator.rs
@@ -157,9 +157,8 @@ impl Sensor for Dummy {
                     UserId::new("test".to_string(), None, None),
                     UserData::new(vec![], 0),
                 );
-                let p = user.data.priority;
                 let id = user.id.clone();
-                return (Some(user), MachineState::used(id, p));
+                return (Some(user), MachineState::used(Some(id)));
             }
         };
 
diff --git a/src/machine.rs b/src/machine.rs
index f96943e..a65d208 100644
--- a/src/machine.rs
+++ b/src/machine.rs
@@ -154,9 +154,8 @@ impl Inner {
                 return self.do_state_change(new_state);
             }
         } else {
-            if self.state.lock_ref().is_higher_priority(who.unwrap().data.priority) {
-                return self.do_state_change(new_state);
-            }
+            // TODO: Correctly check permissions here
+            return self.do_state_change(new_state);
         }
 
         return Err(Error::Denied);
diff --git a/src/main.rs b/src/main.rs
index bf0f984..15f4991 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -195,8 +195,10 @@ fn maybe(matches: clap::ArgMatches, log: Arc<Logger>) -> Result<(), Error> {
                 // when bffh should exit
                 let r = server::serve_api_connections(log.clone(), config, db, network);
 
+                // One of them would be enough really, but *shrug*
                 signal.try_send(());
                 std::mem::drop(signal);
+
                 return r;
             });
 
diff --git a/src/modules/shelly.rs b/src/modules/shelly.rs
index c4c6cdc..798a1a5 100644
--- a/src/modules/shelly.rs
+++ b/src/modules/shelly.rs
@@ -50,7 +50,7 @@ impl Actuator for Shelly {
         info!(self.log, "Machine Status changed: {:?}", state);
         let topic = format!("shellies/{}/relay/0/command", self.name);
         let pl = match state.state {
-            Status::InUse(_, _) => "on",
+            Status::InUse(_) => "on",
             _ => "off",
         };
         let msg = mqtt::Message::new(topic, pl, 0);