Tuning first rail runner.  Am set at 4" steer in 4 feet on a bsa wheel base.  When I run it on a rail, the rears are not centered over the rail but stay off. ( in three feet any way).  Should they be centered?  I do not have the dfw set in. Do I need more bend in axle.  Help please.
Thanks.
				
			Thanks.
 
	 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		