diff --git a/core/src/main/java/com/volmit/iris/engine/object/IrisCompat.java b/core/src/main/java/com/volmit/iris/engine/object/IrisCompat.java
index 7f2d8ed73..8d2b32fb6 100644
--- a/core/src/main/java/com/volmit/iris/engine/object/IrisCompat.java
+++ b/core/src/main/java/com/volmit/iris/engine/object/IrisCompat.java
@@ -122,6 +122,10 @@ public class IrisCompat {
     private static KList<IrisCompatabilityBlockFilter> getDefaultBlockCompatabilityFilters() {
         KList<IrisCompatabilityBlockFilter> filters = new KList<>();
 
+        filters.add(new IrisCompatabilityBlockFilter("CHAIN", "IRON_CHAIN"));
+        filters.add(new IrisCompatabilityBlockFilter("GRASS", "SHORT_GRASS"));
+        filters.add(new IrisCompatabilityBlockFilter("SHORT_GRASS", "GRASS"));
+
         // Below 1.16
         filters.add(new IrisCompatabilityBlockFilter("WEEPING_VINES", "NETHER_FENCE"));
         filters.add(new IrisCompatabilityBlockFilter("WEEPING_VINES_PLANT", "NETHER_FENCE"));
@@ -160,7 +164,7 @@ public class IrisCompat {
         filters.add(new IrisCompatabilityBlockFilter("CRACKED_NETHER_BRICKS", "NETHER_BRICKS"));
         filters.add(new IrisCompatabilityBlockFilter("CHISELED_NETHER_BRICKS", "NETHER_BRICKS"));
         filters.add(new IrisCompatabilityBlockFilter("NETHER_FENCE", "LEGACY_NETHER_FENCE"));
-        filters.add(new IrisCompatabilityBlockFilter("CHAIN", "IRON_BARS"));
+        filters.add(new IrisCompatabilityBlockFilter("IRON_CHAIN", "IRON_BARS"));
         filters.add(new IrisCompatabilityBlockFilter("NETHERITE_BLOCK", "QUARTZ_BLOCK"));
         filters.add(new IrisCompatabilityBlockFilter("BLACKSTONE", "COBBLESTONE"));
         filters.add(new IrisCompatabilityBlockFilter("BASALT", "STONE"));
@@ -254,7 +258,6 @@ public class IrisCompat {
         filters.add(new IrisCompatabilityBlockFilter("BAMBOO", "BIRCH_FENCE"));
         filters.add(new IrisCompatabilityBlockFilter("BAMBOO_SAPLING", "BIRCH_SAPLING"));
         filters.add(new IrisCompatabilityBlockFilter("POTTED_BAMBOO", "POTTED_BIRCH_SAPLING"));
-        filters.add(new IrisCompatabilityBlockFilter("GRASS", "SHORT_GRASS"));
 
         return filters;
     }
diff --git a/core/src/main/java/com/volmit/iris/util/data/IrisCustomData.java b/core/src/main/java/com/volmit/iris/util/data/IrisCustomData.java
index 20076cf84..da60f704c 100644
--- a/core/src/main/java/com/volmit/iris/util/data/IrisCustomData.java
+++ b/core/src/main/java/com/volmit/iris/util/data/IrisCustomData.java
@@ -24,8 +24,7 @@ public interface IrisCustomData extends BlockData {
 					case "merge" -> of(base.merge((BlockData) args[0]), custom);
 					case "clone" -> of(base.clone(), custom);
 					case "hashCode" -> Objects.hash(base, custom);
-                    case "copyTo" -> throw new UnsupportedOperationException("Cannot copy from custom block data");
-					case "matches" -> {
+                    case "matches" -> {
 						if (!(args[0] instanceof IrisCustomData store))
 							yield false;
 						yield base.matches(store.getBase()) && custom.equals(store.getCustom());