diff --git a/release-packaging/Classes/FluidNormalize.sc b/release-packaging/Classes/FluidNormalize.sc
index 6147d6f..e7e40bf 100644
--- a/release-packaging/Classes/FluidNormalize.sc
+++ b/release-packaging/Classes/FluidNormalize.sc
@@ -1,6 +1,6 @@
 FluidNormalize : FluidModelObject {
 
-    var <>min, <>max, <>invert;
+    var <>min, <>max;
 
 	*new {|server, min = 0, max = 1|
 		^super.new(server,[min,max])
diff --git a/release-packaging/Classes/FluidRobustScale.sc b/release-packaging/Classes/FluidRobustScale.sc
index 0126f30..87ebefa 100644
--- a/release-packaging/Classes/FluidRobustScale.sc
+++ b/release-packaging/Classes/FluidRobustScale.sc
@@ -2,8 +2,8 @@ FluidRobustScale : FluidModelObject {
 
     var <>low, <>high;
 
-	*new {|server, low = 25, high = 75, invert = 0|
-		^super.new(server,[low,high,invert])
+	*new {|server, low = 25, high = 75|
+		^super.new(server,[low,high])
 		.low_(low).high_(high);
 	}
 
diff --git a/release-packaging/Classes/FluidStandardize.sc b/release-packaging/Classes/FluidStandardize.sc
index 2e5e9ca..05f0f4a 100644
--- a/release-packaging/Classes/FluidStandardize.sc
+++ b/release-packaging/Classes/FluidStandardize.sc
@@ -1,8 +1,6 @@
 FluidStandardize : FluidModelObject {
 
-    var <>invert;
-
-    *new {|server, invert = 0|
+    *new {|server|
 		^super.new(server,[]);
 	}