diff --git a/src/main/java/de/saschat/createcomputing/peripherals/handles/RedstoneHandle.java b/src/main/java/de/saschat/createcomputing/peripherals/handles/RedstoneHandle.java
index 8562018..fdaceee 100644
--- a/src/main/java/de/saschat/createcomputing/peripherals/handles/RedstoneHandle.java
+++ b/src/main/java/de/saschat/createcomputing/peripherals/handles/RedstoneHandle.java
@@ -38,14 +38,13 @@ public ComputerizedRedstoneLinkTile.LinkPair getHandle() throws LuaException {
         return linkPair;
     }
 
-    @LuaFunction(mainThread = true)
+    @LuaFunction(mainThread = false)
     public final void setSignal(IArguments arguments) throws LuaException {
         isOpen();
         int value = arguments.getInt(0);
-        System.out.println("sx: " + value);
         getHandle().provideSignal(value);
     }
-    @LuaFunction(mainThread = true)
+    @LuaFunction(mainThread = false)
     public final int getSignal(IArguments arguments) throws LuaException {
         isOpen();
         return getHandle().retrieveSignal();
diff --git a/src/main/java/de/saschat/createcomputing/tiles/ComputerizedRedstoneLinkTile.java b/src/main/java/de/saschat/createcomputing/tiles/ComputerizedRedstoneLinkTile.java
index 137dea5..0d065b0 100644
--- a/src/main/java/de/saschat/createcomputing/tiles/ComputerizedRedstoneLinkTile.java
+++ b/src/main/java/de/saschat/createcomputing/tiles/ComputerizedRedstoneLinkTile.java
@@ -155,6 +155,7 @@ public static class LinkPair {
 
         public boolean registered = false;
 
+        public boolean dirty = false;
         public int sendSignal = 0;
         public int recvSignal = 0;
         ComputerizedRedstoneLinkTile parent;
@@ -218,13 +219,16 @@ public int retrieveSignal() {
         private void dirty() {
             if (parent.getLevel().isClientSide())
                 return;
+            if (dirty) return;
+            dirty = true;
             parent.tasks.add(this::_dirty);
-            parent.setChanged();
         }
 
         private void _dirty() {
+            dirty = false;
             transmit.notifySignalChange();
             receive.notifySignalChange();
+            parent.setChanged();
         }
 
         private void setSignal(int i) {