diff --git a/Assets/Scenes/TowerTest.unity b/Assets/Scenes/TowerTest.unity
index 2424707..a9d466b 100644
--- a/Assets/Scenes/TowerTest.unity
+++ b/Assets/Scenes/TowerTest.unity
@@ -934,7 +934,7 @@ PrefabInstance:
     - target: {fileID: 2981308973353539976, guid: fd9f9b61c0ebb324ebc9f929e26706bc,
         type: 3}
       propertyPath: m_LocalPosition.y
-      value: 4.29
+      value: 2.95
       objectReference: {fileID: 0}
     - target: {fileID: 2981308973353539976, guid: fd9f9b61c0ebb324ebc9f929e26706bc,
         type: 3}
@@ -969,7 +969,7 @@ PrefabInstance:
     - target: {fileID: 3665490202611795451, guid: fd9f9b61c0ebb324ebc9f929e26706bc,
         type: 3}
       propertyPath: m_LocalPosition.y
-      value: 4.29
+      value: 2.95
       objectReference: {fileID: 0}
     - target: {fileID: 3665490202611795451, guid: fd9f9b61c0ebb324ebc9f929e26706bc,
         type: 3}
@@ -1004,7 +1004,7 @@ PrefabInstance:
     - target: {fileID: 6115888582170302332, guid: fd9f9b61c0ebb324ebc9f929e26706bc,
         type: 3}
       propertyPath: m_LocalPosition.y
-      value: 0.84
+      value: -0.5
       objectReference: {fileID: 0}
     - target: {fileID: 6115888582170302332, guid: fd9f9b61c0ebb324ebc9f929e26706bc,
         type: 3}
diff --git a/Assets/Scripts/Utilities/EditableArc.cs b/Assets/Scripts/Utilities/EditableArc.cs
index 5a0193d..83077f9 100644
--- a/Assets/Scripts/Utilities/EditableArc.cs
+++ b/Assets/Scripts/Utilities/EditableArc.cs
@@ -70,14 +70,15 @@ public class EditableArc : MonoBehaviour
         Vector3 start = Quaternion.AngleAxis(rotationMinMax.x, normal) * tangent;
         Vector3 end = Quaternion.AngleAxis(rotationMinMax.y, normal) * tangent;
         Vector3 v1 = SamplePointOnArcAngle(start, end, visualRadius, Value.Value);
-        Vector3 v2 = SamplePointOnArcAngle(start, end, visualRadius, Value.Value + 0.01f);
-        Vector3 arcTangent = v2 - v1;
+        Vector3 v2 = SamplePointOnArcAngle(start, end, visualRadius, Value.Value + 1f);
+        Vector3 arcTangent = (v2 - v1).normalized;
         Debug.DrawRay(knob.transform.position, arcTangent, Color.yellow, 5f);
+        Debug.Log($"tangent: {arcTangent}");
 
         // TODO: figure out this based on camera orientation
         float sign = -1f;
 
-        float delta = (Vector2.Dot(arcTangent, Vector2.up * mouseMovement.x) + Vector2.Dot(arcTangent, Vector2.right * mouseMovement.y)) * knobSensitiviy;
+        float delta = (Vector2.Dot(arcTangent, Vector2.up * mouseMovement.x) + Vector2.Dot(arcTangent, Vector2.right * mouseMovement.y)) * knobSensitiviy * sign;
         Debug.Log(delta);
         float newAngle = ClampAngle(Value.Value + delta, rotationMinMax.x, rotationMinMax.y);
         Value.Value = newAngle;
diff --git a/ProjectSettings/TagManager.asset b/ProjectSettings/TagManager.asset
index 65d15ac..13bf0b7 100644
--- a/ProjectSettings/TagManager.asset
+++ b/ProjectSettings/TagManager.asset
@@ -3,7 +3,8 @@
 --- !u!78 &1
 TagManager:
   serializedVersion: 2
-  tags: []
+  tags:
+  - Wall
   layers:
   - Default
   - TransparentFX