Jim, you probably already know this, but for the benefit of others, you break the track between the sprocket and the rear bogie wheel. 
If the tracks are not even, the carrier "walks" to one side and you need to continually correct as you drive.
		 
		
		
		
		
		
		
			
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				Bluebell 
 
Carrier Armoured O.P. No1 Mk3 W.  T84991 
Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. 
Dodge WC55. 37mm Gun Motor Carriage M6 
Jeep Mb #135668 
So many questions....
			 
		
		
		
		
		
	
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