diff --git a/diylc/diylc-library/lib/diylc-core.jar b/diylc/diylc-library/lib/diylc-core.jar
index ea1c3510..d44183a2 100644
Binary files a/diylc/diylc-library/lib/diylc-core.jar and b/diylc/diylc-library/lib/diylc-core.jar differ
diff --git a/diylc/diylc-library/src/org/diylc/components/guitar/LeverSwitch.java b/diylc/diylc-library/src/org/diylc/components/guitar/LeverSwitch.java
index 1dcdc782..5ba9d7d0 100644
--- a/diylc/diylc-library/src/org/diylc/components/guitar/LeverSwitch.java
+++ b/diylc/diylc-library/src/org/diylc/components/guitar/LeverSwitch.java
@@ -462,7 +462,7 @@ public class LeverSwitch extends AbstractTransparentComponent<String> implements
       case DP3T:
         return (index2 == 6 || index1 == 1) && index2 == index1 + 2 * (position + 1);
       case DP4T:
-        return (index2 == 8 || index1 == 1) && index2 - index1 == position + 1;
+        return (index2 == 8 || index1 == 1) && index2 == index1 + 2 * (position + 1);
       case DP3T_5pos:
         if (position % 2 == 0)          
           return (index2 == 6 || index1 == 1) && index2 == index1 + position + 2;
diff --git a/diylc/diylc-swing/lib/diylc-core.jar b/diylc/diylc-swing/lib/diylc-core.jar
index ea1c3510..d44183a2 100644
Binary files a/diylc/diylc-swing/lib/diylc-core.jar and b/diylc/diylc-swing/lib/diylc-core.jar differ
diff --git a/diylc/diylc-swing/library/main.jar b/diylc/diylc-swing/library/main.jar
index cb31e632..e7d2c9ba 100644
Binary files a/diylc/diylc-swing/library/main.jar and b/diylc/diylc-swing/library/main.jar differ