diff --git a/Changelog.md b/Changelog.md
index 05cf2744..950ad30d 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -11,6 +11,7 @@
 - Added: Filter function to Iterators/Iterables (Iterable implements it by default)
 - Changed: Cleanup of some variables/mappers
 - Added/Fixed: AVL/RBTreeMap got reworked and SubMaps work more properly now. Also forEach support got improved a lot
+- Added/Fixed: TreeSubSets (RB/AVL) got their functional implementations improved too.
 
 ### Version 0.3.6
 - Fixed: addAll non Type Specific Lists was causing crashes.
diff --git a/src/builder/resources/speiger/assets/collections/templates/sets/AVLTreeSet.template b/src/builder/resources/speiger/assets/collections/templates/sets/AVLTreeSet.template
index 1bc07182..6def463a 100644
--- a/src/builder/resources/speiger/assets/collections/templates/sets/AVLTreeSet.template
+++ b/src/builder/resources/speiger/assets/collections/templates/sets/AVLTreeSet.template
@@ -747,6 +747,9 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			return new DescendingSubSetBRACES(set, fromStart, start, loInclusive, false, fromElement, inclusive);
 		}
 		
+		protected Entry KEY_GENERIC_TYPE next(Entry KEY_GENERIC_TYPE entry) { return entry.previous(); }
+        protected Entry KEY_GENERIC_TYPE start() { return findHighest(); }
+		
 		@Override
 		public KEY_TYPE FIRST_KEY() { return super.LAST_KEY(); }
 		
@@ -852,6 +855,8 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
         boolean inRange(KEY_TYPE key) { return !tooLow(key) && !tooHigh(key); }
         boolean inClosedRange(KEY_TYPE key) { return (fromStart || set.compare(key, start) >= 0) && (toEnd || set.compare(end, key) >= 0); }
         boolean inRange(KEY_TYPE key, boolean inclusive) { return inclusive ? inRange(key) : inClosedRange(key); }
+        protected Entry KEY_GENERIC_TYPE next(Entry KEY_GENERIC_TYPE entry) { return entry.next(); }
+        protected Entry KEY_GENERIC_TYPE start() { return findLowest(); }
         
 		@Override
 		public boolean addAndMoveToFirst(KEY_TYPE o) { throw new UnsupportedOperationException(); }
@@ -994,6 +999,57 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			return fromStart && toEnd ? set.size() : iterator().skip(Integer.MAX_VALUE);
 		}
 		
+		@Override
+		public void forEach(CONSUMER KEY_SUPER_GENERIC_TYPE action) {
+			Objects.requireNonNull(action);
+			for(Entry KEY_GENERIC_TYPE entry = start();entry != null && inRange(entry.key);entry = next(entry)) {
+				action.accept(entry.key);
+			}
+		}
+		
+		@Override
+		public <E> void forEach(E input, BI_OBJECT_CONSUMER KKS_GENERIC_TYPE<E> action) {
+			Objects.requireNonNull(action);
+			for(Entry KEY_GENERIC_TYPE entry = start();entry != null && inRange(entry.key);entry = next(entry))
+				action.accept(entry.key, input);		
+		}
+		
+		@Override
+		public boolean matchesAny(PREDICATE KEY_GENERIC_TYPE filter) {
+			Objects.requireNonNull(filter);
+			for(Entry KEY_GENERIC_TYPE entry = start();entry != null && inRange(entry.key);entry = next(entry)) {
+				if(filter.TEST_VALUE(entry.key)) return true;
+			}
+			return false;
+		}
+		
+		@Override
+		public boolean matchesNone(PREDICATE KEY_GENERIC_TYPE filter) {
+			Objects.requireNonNull(filter);
+			for(Entry KEY_GENERIC_TYPE entry = start();entry != null && inRange(entry.key);entry = next(entry)) {
+				if(filter.TEST_VALUE(entry.key)) return false;
+			}
+			return true;
+		}
+		
+		@Override
+		public boolean matchesAll(PREDICATE KEY_GENERIC_TYPE filter) {
+			Objects.requireNonNull(filter);
+			for(Entry KEY_GENERIC_TYPE entry = start();entry != null && inRange(entry.key);entry = next(entry)) {
+				if(!filter.TEST_VALUE(entry.key)) return false;
+			}
+			return true;
+		}
+		
+		@Override
+		public KEY_TYPE findFirst(PREDICATE KEY_GENERIC_TYPE filter) {
+			Objects.requireNonNull(filter);
+			for(Entry KEY_GENERIC_TYPE entry = start();entry != null && inRange(entry.key);entry = next(entry)) {
+				if(filter.TEST_VALUE(entry.key)) return entry.key;
+			}
+			return EMPTY_VALUE;
+		}
+		
 		class SubSetIterator implements LIST_ITERATOR KEY_GENERIC_TYPE
 		{
 			Entry KEY_GENERIC_TYPE previous;
diff --git a/src/builder/resources/speiger/assets/collections/templates/sets/RBTreeSet.template b/src/builder/resources/speiger/assets/collections/templates/sets/RBTreeSet.template
index 9fd8819f..315e742b 100644
--- a/src/builder/resources/speiger/assets/collections/templates/sets/RBTreeSet.template
+++ b/src/builder/resources/speiger/assets/collections/templates/sets/RBTreeSet.template
@@ -808,6 +808,9 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			return new DescendingSubSetBRACES(set, fromStart, start, loInclusive, false, fromElement, inclusive);
 		}
 		
+		protected Entry KEY_GENERIC_TYPE next(Entry KEY_GENERIC_TYPE entry) { return entry.previous(); }
+        protected Entry KEY_GENERIC_TYPE start() { return findHighest(); }
+
 		@Override
 		public KEY_TYPE FIRST_KEY() { return super.LAST_KEY(); }
 		
@@ -913,6 +916,8 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
         boolean inRange(KEY_TYPE key) { return !tooLow(key) && !tooHigh(key); }
         boolean inClosedRange(KEY_TYPE key) { return (fromStart || set.compare(key, start) >= 0) && (toEnd || set.compare(end, key) >= 0); }
         boolean inRange(KEY_TYPE key, boolean inclusive) { return inclusive ? inRange(key) : inClosedRange(key); }
+        protected Entry KEY_GENERIC_TYPE next(Entry KEY_GENERIC_TYPE entry) { return entry.next(); }
+        protected Entry KEY_GENERIC_TYPE start() { return findLowest(); }
         
 		@Override
 		public boolean addAndMoveToFirst(KEY_TYPE o) { throw new UnsupportedOperationException(); }
@@ -1055,6 +1060,57 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			return fromStart && toEnd ? set.size() : iterator().skip(Integer.MAX_VALUE);
 		}
 		
+		@Override
+		public void forEach(CONSUMER KEY_SUPER_GENERIC_TYPE action) {
+			Objects.requireNonNull(action);
+			for(Entry KEY_GENERIC_TYPE entry = start();entry != null && inRange(entry.key);entry = next(entry)) {
+				action.accept(entry.key);
+			}
+		}
+		
+		@Override
+		public <E> void forEach(E input, BI_OBJECT_CONSUMER KKS_GENERIC_TYPE<E> action) {
+			Objects.requireNonNull(action);
+			for(Entry KEY_GENERIC_TYPE entry = start();entry != null && inRange(entry.key);entry = next(entry))
+				action.accept(entry.key, input);		
+		}
+		
+		@Override
+		public boolean matchesAny(PREDICATE KEY_GENERIC_TYPE filter) {
+			Objects.requireNonNull(filter);
+			for(Entry KEY_GENERIC_TYPE entry = start();entry != null && inRange(entry.key);entry = next(entry)) {
+				if(filter.TEST_VALUE(entry.key)) return true;
+			}
+			return false;
+		}
+		
+		@Override
+		public boolean matchesNone(PREDICATE KEY_GENERIC_TYPE filter) {
+			Objects.requireNonNull(filter);
+			for(Entry KEY_GENERIC_TYPE entry = start();entry != null && inRange(entry.key);entry = next(entry)) {
+				if(filter.TEST_VALUE(entry.key)) return false;
+			}
+			return true;
+		}
+		
+		@Override
+		public boolean matchesAll(PREDICATE KEY_GENERIC_TYPE filter) {
+			Objects.requireNonNull(filter);
+			for(Entry KEY_GENERIC_TYPE entry = start();entry != null && inRange(entry.key);entry = next(entry)) {
+				if(!filter.TEST_VALUE(entry.key)) return false;
+			}
+			return true;
+		}
+		
+		@Override
+		public KEY_TYPE findFirst(PREDICATE KEY_GENERIC_TYPE filter) {
+			Objects.requireNonNull(filter);
+			for(Entry KEY_GENERIC_TYPE entry = start();entry != null && inRange(entry.key);entry = next(entry)) {
+				if(filter.TEST_VALUE(entry.key)) return entry.key;
+			}
+			return EMPTY_VALUE;
+		}
+		
 		class SubSetIterator implements LIST_ITERATOR KEY_GENERIC_TYPE
 		{
 			Entry KEY_GENERIC_TYPE previous;