diff --git a/build.gradle b/build.gradle
index 57ad079..1619f83 100644
--- a/build.gradle
+++ b/build.gradle
@@ -13,7 +13,7 @@ apply plugin: 'net.minecraftforge.gradle'
 apply plugin: 'eclipse'
 apply plugin: 'maven-publish'
 
-version = '1.16.5-1.8.2'
+version = '1.16.5-1.8.3'
 group = 'com.dannyandson.tinyredstone' // http://maven.apache.org/guides/mini/guide-naming-conventions.html
 archivesBaseName = 'tinyredstone'
 
diff --git a/src/main/java/com/dannyandson/tinyredstone/blocks/PanelCellPos.java b/src/main/java/com/dannyandson/tinyredstone/blocks/PanelCellPos.java
index fa6a2b4..8743e28 100644
--- a/src/main/java/com/dannyandson/tinyredstone/blocks/PanelCellPos.java
+++ b/src/main/java/com/dannyandson/tinyredstone/blocks/PanelCellPos.java
@@ -13,6 +13,7 @@ public class PanelCellPos {
     private final int row;
     private final int column;
     private final int level;
+    private Integer index=null;
     private final PanelTile panelTile;
 
     protected PanelCellPos(PanelTile panelTile, int row, int column, int level) {
@@ -47,7 +48,9 @@ public int getLevel(){
     }
 
     public int getIndex() {
-        return (level*64) + (row * 8) + column;
+        if (this.index==null)
+            this.index=(level*64) + (row * 8) + column;
+        return this.index;
     }
 
     public PanelTile getPanelTile(){