Index: binaries/data/mods/public/simulation/components/Garrisonable.js
===================================================================
--- binaries/data/mods/public/simulation/components/Garrisonable.js
+++ binaries/data/mods/public/simulation/components/Garrisonable.js
@@ -152,8 +152,23 @@
 	let holder = this.holder;
 	this.UnGarrison(true, true);
 	let cmpGarrisonable = Engine.QueryInterface(msg.newentity, IID_Garrisonable);
-	if (cmpGarrisonable)
-		cmpGarrisonable.Garrison(holder, true);
+	if (!cmpGarrisonable || !cmpGarrisonable.Garrison(holder, true))
+	{
+		let cmpPositionSelf = Engine.QueryInterface(this.entity, IID_Position);
+		let cmpPositionNew = Engine.QueryInterface(msg.newentity, IID_Position);
+		if (cmpPositionSelf && cmpPositionNew)
+		{
+			if (cmpPositionSelf.IsInWorld())
+			{
+				let pos = cmpPositionSelf.GetPosition2D();
+				cmpPositionNew.JumpTo(pos.x, pos.y);
+			}
+			let rot = cmpPositionSelf.GetRotation();
+			cmpPositionNew.SetYRotation(rot.y);
+			cmpPositionNew.SetXZRotation(rot.x, rot.z);
+			cmpPositionNew.SetHeightOffset(cmpPositionSelf.GetHeightOffset());
+		}
+	}
 };
 
 Engine.RegisterComponentType(IID_Garrisonable, "Garrisonable", Garrisonable);
Index: binaries/data/mods/public/simulation/components/Turretable.js
===================================================================
--- binaries/data/mods/public/simulation/components/Turretable.js
+++ binaries/data/mods/public/simulation/components/Turretable.js
@@ -147,8 +147,23 @@
 	let currentPoint = cmpTurretHolder.GetOccupiedTurretName(this.entity);
 	this.LeaveTurret(true);
 	let cmpTurretableNew = Engine.QueryInterface(msg.newentity, IID_Turretable);
-	if (cmpTurretableNew)
-		cmpTurretableNew.OccupyTurret(holder, currentPoint);
+	if (!cmpTurretableNew || !cmpTurretableNew.OccupyTurret(holder, currentPoint))
+	{
+		let cmpPositionSelf = Engine.QueryInterface(this.entity, IID_Position);
+		let cmpPositionNew = Engine.QueryInterface(msg.newentity, IID_Position);
+		if (cmpPositionSelf && cmpPositionNew)
+		{
+			if (cmpPositionSelf.IsInWorld())
+			{
+				let pos = cmpPositionSelf.GetPosition2D();
+				cmpPositionNew.JumpTo(pos.x, pos.y);
+			}
+			let rot = cmpPositionSelf.GetRotation();
+			cmpPositionNew.SetYRotation(rot.y);
+			cmpPositionNew.SetXZRotation(rot.x, rot.z);
+			cmpPositionNew.SetHeightOffset(cmpPositionSelf.GetHeightOffset());
+		}
+	}
 };
 
 Turretable.prototype.OnOwnershipChanged = function(msg)
Index: binaries/data/mods/public/simulation/helpers/Transform.js
===================================================================
--- binaries/data/mods/public/simulation/helpers/Transform.js
+++ binaries/data/mods/public/simulation/helpers/Transform.js
@@ -58,30 +58,6 @@
 	if (cmpBuilderList && cmpNewBuilderList)
 		cmpNewBuilderList.AddBuilders(cmpBuilderList.GetBuilders());
 
-	var cmpUnitAI = Engine.QueryInterface(oldEnt, IID_UnitAI);
-	var cmpNewUnitAI = Engine.QueryInterface(newEnt, IID_UnitAI);
-	if (cmpUnitAI && cmpNewUnitAI)
-	{
-		let pos = cmpUnitAI.GetHeldPosition();
-		if (pos)
-			cmpNewUnitAI.SetHeldPosition(pos.x, pos.z);
-		if (cmpUnitAI.GetStanceName())
-			cmpNewUnitAI.SwitchToStance(cmpUnitAI.GetStanceName());
-		if (cmpUnitAI.GetGarrisonHolder() != INVALID_ENTITY)
-			cmpNewUnitAI.SetGarrisoned();
-		cmpNewUnitAI.AddOrders(cmpUnitAI.GetOrders());
-		if (cmpUnitAI.IsGuardOf())
-		{
-			let guarded = cmpUnitAI.IsGuardOf();
-			let cmpGuard = Engine.QueryInterface(guarded, IID_Guard);
-			if (cmpGuard)
-			{
-				cmpGuard.RenameGuard(oldEnt, newEnt);
-				cmpNewUnitAI.SetGuardOf(guarded);
-			}
-		}
-	}
-
 	let cmpPromotion = Engine.QueryInterface(oldEnt, IID_Promotion);
 	let cmpNewPromotion = Engine.QueryInterface(newEnt, IID_Promotion);
 	if (cmpPromotion && cmpNewPromotion)
@@ -133,6 +109,27 @@
 
 	Engine.PostMessage(oldEnt, MT_EntityRenamed, { "entity": oldEnt, "newentity": newEnt });
 
+	// UnitAI generally needs other components to be properly initialised.
+	let cmpUnitAI = Engine.QueryInterface(oldEnt, IID_UnitAI);
+	let cmpNewUnitAI = Engine.QueryInterface(newEnt, IID_UnitAI);
+	if (cmpUnitAI && cmpNewUnitAI)
+	{
+		let pos = cmpUnitAI.GetHeldPosition();
+		if (pos)
+			cmpNewUnitAI.SetHeldPosition(pos.x, pos.z);
+		cmpNewUnitAI.AddOrders(cmpUnitAI.GetOrders());
+		let guarded = cmpUnitAI.IsGuardOf();
+		if (guarded)
+		{
+			let cmpGuarded = Engine.QueryInterface(guarded, IID_Guard);
+			if (cmpGuarded)
+			{
+				cmpGuarded.RenameGuard(oldEnt, newEnt);
+				cmpNewUnitAI.SetGuardOf(guarded);
+			}
+		}
+	}
+
 	if (cmpPosition && cmpPosition.IsInWorld())
 		cmpPosition.MoveOutOfWorld();
 	Engine.DestroyEntity(oldEnt);
Index: binaries/data/mods/public/simulation/templates/units/athen/infantry_slinger_a.xml
===================================================================
--- binaries/data/mods/public/simulation/templates/units/athen/infantry_slinger_a.xml
+++ binaries/data/mods/public/simulation/templates/units/athen/infantry_slinger_a.xml
@@ -3,9 +3,11 @@
   <Identity>
     <Rank>Advanced</Rank>
   </Identity>
+  <Garrisonable disable=""/>
   <Promotion>
     <Entity>units/athen/infantry_slinger_e</Entity>
   </Promotion>
+  <Turretable disable=""/>
   <VisualActor>
     <Actor>units/athenians/infantry_slinger_a.xml</Actor>
   </VisualActor>