diff --git a/AlgebraicDataflowArchitectureModel/models/Game.model b/AlgebraicDataflowArchitectureModel/models/Game.model
index bc6ae7b..bc90ba4 100644
--- a/AlgebraicDataflowArchitectureModel/models/Game.model
+++ b/AlgebraicDataflowArchitectureModel/models/Game.model
@@ -10,10 +10,15 @@
 	out velocity(v, e) == x
 }
 
+channel CIO3 {
+	out mass(m:Double, setMass(x:Double)) == x
+	out mass(m, e) == m
+}
+
 channel C1 {
-	in force(f, update1(y, m)) == y
-	in mass(m:Double, update1(y, m)) == m
-	out acceleration(a: Double, update1(y, m)) == y / m
+	in force(f, update1(y, z)) == y
+	in mass(m, update1(y, z)) == z
+	out acceleration(a: Double, update1(y, z)) == y / z
 }
 
 channel C2 {