diff --git a/Assets/Scenes/Levels/CementFactory.unity b/Assets/Scenes/Levels/CementFactory.unity
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     - target: {fileID: 7338175006250910518, guid: 1c956b50a36cb0d409d69df3a59377b2, type: 3}
       propertyPath: m_LocalPosition.y
-      value: 1.3100004
+      value: 6.25
       objectReference: {fileID: 0}
     - target: {fileID: 7488072885374278401, guid: 1c956b50a36cb0d409d69df3a59377b2, type: 3}
       propertyPath: m_Controller
@@ -327584,11 +327805,11 @@ PrefabInstance:
       objectReference: {fileID: 9100000, guid: fd49be538e07fb744860136761ab144f, type: 2}
     - target: {fileID: 7508847384281937588, guid: 1c956b50a36cb0d409d69df3a59377b2, type: 3}
       propertyPath: m_LocalPosition.x
-      value: 1.55
+      value: 3.3
       objectReference: {fileID: 0}
     - target: {fileID: 7508847384281937588, guid: 1c956b50a36cb0d409d69df3a59377b2, type: 3}
       propertyPath: m_LocalPosition.y
-      value: 2.31
+      value: 11.78
       objectReference: {fileID: 0}
     - target: {fileID: 7558457198582461538, guid: 1c956b50a36cb0d409d69df3a59377b2, type: 3}
       propertyPath: m_LocalPosition.x
@@ -327636,19 +327857,19 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 7759211224397440031, guid: 1c956b50a36cb0d409d69df3a59377b2, type: 3}
       propertyPath: m_LocalPosition.x
-      value: -0.3
+      value: -11.26
       objectReference: {fileID: 0}
     - target: {fileID: 7759211224397440031, guid: 1c956b50a36cb0d409d69df3a59377b2, type: 3}
       propertyPath: m_LocalPosition.y
-      value: -7.54
+      value: -1.2
       objectReference: {fileID: 0}
     - target: {fileID: 7842440814220139303, guid: 1c956b50a36cb0d409d69df3a59377b2, type: 3}
       propertyPath: m_LocalPosition.x
-      value: 0.05
+      value: -11.87
       objectReference: {fileID: 0}
     - target: {fileID: 7842440814220139303, guid: 1c956b50a36cb0d409d69df3a59377b2, type: 3}
       propertyPath: m_LocalPosition.y
-      value: -2.18
+      value: 0.26
       objectReference: {fileID: 0}
     - target: {fileID: 7848397806898645977, guid: 1c956b50a36cb0d409d69df3a59377b2, type: 3}
       propertyPath: m_LocalPosition.x
diff --git a/Assets/Scripts/DamianExperiments/WorkerBeltApproachingBehaviour.cs b/Assets/Scripts/DamianExperiments/WorkerBeltApproachingBehaviour.cs
index 9b84bf68..8f932e1b 100644
--- a/Assets/Scripts/DamianExperiments/WorkerBeltApproachingBehaviour.cs
+++ b/Assets/Scripts/DamianExperiments/WorkerBeltApproachingBehaviour.cs
@@ -19,11 +19,11 @@ public class WorkerBeltApproachingBehaviour : AppleState
 
     private void OnEnable()
     {
-        
-        Transform anchorB = transform.Find("AnchorA");
-        if (anchorB != null)
+        // ensure roaming ref exists before accessing
+        Transform anchorA = transform.Find("AnchorA");
+        if (anchorA != null && workerBeltRoamingRef != null)
         {
-            anchorB.position = workerBeltRoamingRef.midRoamPosition;
+            anchorA.position = workerBeltRoamingRef.midRoamPosition;
         }
 
         Debug.Log("Entered Worker Belt Approaching State");
@@ -50,6 +50,9 @@ public class WorkerBeltApproachingBehaviour : AppleState
     private void OnDisable()
     {
         Debug.Log("Exited Worker Belt Approaching State");
+        // stop active tween to avoid it running while disabled
+        aproachTween?.Stop();
+        aproachTween = null;
     }
 
     // callback implementations
@@ -63,15 +66,24 @@ public class WorkerBeltApproachingBehaviour : AppleState
         Debug.Log("Approach tween finished");
         // cleanup
         aproachTween?.Stop();
-        workerAnimator.SetBool("isLifting?", true);
-        workerBeltStateMAchineRef.ChangeState(2);
+        aproachTween = null;
+        if (workerAnimator != null)
+            workerAnimator.SetBool("isLifting?", true);
+        if (workerBeltStateMAchineRef != null)
+            workerBeltStateMAchineRef.ChangeState(2);
     }
 
     public void Update()
     {
-        if (ApproachingSpline.GetDirection(aproachTween.Percentage).x > 0.1)
-            workerAnimator.SetBool("walkingRight?", true);
+        if (ApproachingSpline == null || aproachTween == null)
+            return;
+
+        // defensively clamp percentage
+        float pct = Mathf.Clamp01(aproachTween.Percentage);
+        Vector3 dir = ApproachingSpline.GetDirection(pct);
+        if (dir.x > 0.1f)
+            workerAnimator?.SetBool("walkingRight?", true);
         else
-            workerAnimator.SetBool("walkingRight?", false);
+            workerAnimator?.SetBool("walkingRight?", false);
     }
 }
diff --git a/Assets/Scripts/DamianExperiments/WorkerBeltRoamingBehaviour.cs b/Assets/Scripts/DamianExperiments/WorkerBeltRoamingBehaviour.cs
index 525e030c..ec4a732d 100644
--- a/Assets/Scripts/DamianExperiments/WorkerBeltRoamingBehaviour.cs
+++ b/Assets/Scripts/DamianExperiments/WorkerBeltRoamingBehaviour.cs
@@ -25,7 +25,9 @@ public class WorkerBeltRoamingBehaviour : AppleState
     
     void OnEnable()
     {
-        workerAnimator.SetBool("isLifting?", false);
+        if (workerAnimator != null)
+            workerAnimator.SetBool("isLifting?", false);
+
         Debug.Log("Entered Worker Belt Roaming State");
 
         if (RoamingSpline == null || workerObjectTransform == null)
@@ -46,35 +48,47 @@ public class WorkerBeltRoamingBehaviour : AppleState
     // Also stop the tween if the GameObject is disabled for any reason (covers StateMachine deactivation)
     void OnDisable()
     {
-        midRoamPosition = workerObjectTransform.position;
-        Debug.Log("WorkerBeltRoamingBehaviour: OnExitState - stopping roaming tween" + midRoamPosition);
+        if (workerObjectTransform != null)
+            midRoamPosition = workerObjectTransform.position;
+        Debug.Log("WorkerBeltRoamingBehaviour:  Stopping roaming tween " + midRoamPosition);
         roamingTween?.Stop();
+        roamingTween = null;
+
+        if (pantsRoutine != null)
+        {
+            StopCoroutine(pantsRoutine);
+            pantsRoutine = null;
+        }
     }
 
     public void Update()
     {
-        if (RoamingSpline.GetDirection(roamingTween.Percentage).x > 0.1)
-            workerAnimator.SetBool("walkingRight?", true);
+        if (RoamingSpline == null || roamingTween == null)
+            return;
+
+        float pct = Mathf.Clamp01(roamingTween.Percentage);
+        Vector3 dir = RoamingSpline.GetDirection(pct);
+        if (dir.x > 0.1f)
+            workerAnimator?.SetBool("walkingRight?", true);
         else
-            workerAnimator.SetBool("walkingRight?", false);
+            workerAnimator?.SetBool("walkingRight?", false);
     }
 
     IEnumerator RandomFallChance()
     {
         while (pantsLess)
+        {
             yield return new WaitForSeconds(2);
             CheckForFall();
-        
+        }
     }
 
     public void CheckForFall()
     {
-        int _randNumber;
-        _randNumber = Random.Range(0, 1);
-
-        if (_randNumber > 5)
+        // 5% chance to fall each check
+        if (Random.value < 0.05f)
         {
-            workerAnimator.SetTrigger("shouldFall?");
+            workerAnimator?.SetTrigger("shouldFall?");
         }
     }
 
@@ -83,6 +97,7 @@ public class WorkerBeltRoamingBehaviour : AppleState
         if (pantsRoutine != null)
         {
             StopCoroutine(pantsRoutine);
+            pantsRoutine = null;
         }
 
     }
diff --git a/Assets/Scripts/DamianExperiments/workerBeltReturningBehaviour.cs b/Assets/Scripts/DamianExperiments/workerBeltReturningBehaviour.cs
index 26324700..4519e4aa 100644
--- a/Assets/Scripts/DamianExperiments/workerBeltReturningBehaviour.cs
+++ b/Assets/Scripts/DamianExperiments/workerBeltReturningBehaviour.cs
@@ -20,26 +20,29 @@ public class WorkerBeltReturningBehaviour : AppleState
 
     private void OnEnable()
     {
-        roamingWorker.SetActive(true);
+        if (roamingWorker != null)
+            roamingWorker.SetActive(true);
+
         Transform anchorA = transform.Find("AnchorA");
-        if (anchorA != null)
+        if (anchorA != null && StartingAnchor != null)
         {
             anchorA.position = StartingAnchor.position;
         }
         Transform anchorB = transform.Find("AnchorB");
-        if (anchorB != null)
+        if (anchorB != null && EndingAnchor != null)
         {
             anchorB.position = EndingAnchor.position;
         }
-        workerAnimator.SetBool("isLifting?", false);
+        if (workerAnimator != null)
+            workerAnimator.SetBool("isLifting?", false);
 
         Debug.Log("Entered Worker Belt Returning State");
         if (ReturningSpline == null || workerObjectTransform == null)
         {
-            Debug.LogWarning("WorkerBeltApproachingBehaviour: ApproachingSpline or workerObjectTransform is not assigned.", this);
+            Debug.LogWarning("WorkerBeltReturningBehaviour: ReturningSpline or workerObjectTransform is not assigned.", this);
             return;
         }
-        // Start the tween to move the worker along the approaching spline
+        // Start the tween to move the worker along the returning spline
         returnTween = Tween.Spline(
             ReturningSpline,
             workerObjectTransform,
@@ -49,29 +52,33 @@ public class WorkerBeltReturningBehaviour : AppleState
             returnDelay,
             Tween.EaseLinear,
             Tween.LoopType.None,
-            HandleApproachStarted,   // optional
-            HandleApproachFinished   // called when spline completes
+            HandleReturnStarted,   // optional
+            HandleReturnFinished   // called when spline completes
         );
     }
 
     private void OnDisable()
     {
         Debug.Log("Exited Worker Belt Returning State");
+        returnTween?.Stop();
+        returnTween = null;
     }
 
     // callback implementations
-    void HandleApproachStarted()
+    void HandleReturnStarted()
     {
         // optional: play audio/anim etc.
     }
 
-    void HandleApproachFinished()
+    void HandleReturnFinished()
     {
 
         Debug.Log("Return tween finished");
         // cleanup
         returnTween?.Stop();
-        workerBeltStateMAchineRef.ChangeState(0);
+        returnTween = null;
+        if (workerBeltStateMAchineRef != null)
+            workerBeltStateMAchineRef.ChangeState(0);
     }
 }