I figured it out.  The locking screw needs to come all the way out, as the spline is grooved to lock onto the edge of the screw.  Using a large screwdriver I was able to ever so slightly spread the cut that the screw tightens up on and the shaft with the shift levers pulled right out. After my modification I lubed the shaft with some white lithium grease and reassembled.  All's good now.
	
		
			
		
		
	
				
			 
 
		 
 
		
 
     