diff --git a/src/engine/objects/ItemTemplate.java b/src/engine/objects/ItemTemplate.java
index 2afec01c..f0a07cb3 100644
--- a/src/engine/objects/ItemTemplate.java
+++ b/src/engine/objects/ItemTemplate.java
@@ -20,11 +20,21 @@ import java.util.HashMap;
 
 public class ItemTemplate {
 
+    // MB Dev Notes:
+    // This class parses JSON data generated by mbEditor Pro 2.1.
+    // Cache definitions are loaded for ItemType.ITEM, ItemType,DEED
+    // and ItemType.RUNE.
+    //
+    // Always read never write!
+    // Use copies of fields to avoid side effects.
+
     // Global template lookup
+
     public static HashMap<Integer, ItemTemplate> templates = new HashMap<>();
     public int template_id;
 
     // Template Properties
+
     public String obj_name;
     public boolean obj_pickable;
     public Vector3fImmutable obj_scale;
@@ -121,10 +131,8 @@ public class ItemTemplate {
     public boolean rune_group_is_guild = false;
     public String rune_dsc;
     public String rune_fx_txt;
-    public EnumSet<mbEnums.MobBehaviourType> rune_group_tactics = EnumSet.noneOf(mbEnums.MobBehaviourType.class);
-    ;
-    public EnumSet<mbEnums.MobBehaviourType> rune_group_role_set = EnumSet.noneOf(mbEnums.MobBehaviourType.class);
-    ;
+    public final EnumSet<mbEnums.MobBehaviourType> rune_group_tactics = EnumSet.noneOf(mbEnums.MobBehaviourType.class);
+    public final EnumSet<mbEnums.MobBehaviourType> rune_group_role_set = EnumSet.noneOf(mbEnums.MobBehaviourType.class);
     public boolean rune_renderable = false;
     public int rune_natural_power_attack;
     public final HashMap<String, String> rune_sparse_data = new HashMap<>();