I am installing a quarter turn ring on my 06 Vegas with Transformer grips. I can get it all together but the housing will not close. The ring rubs and hits the housing at what look to be start and stop notches in the housing. What am I doing wrong? Am I supposed to grind those down? I don't really understand how the throttle works. Does it hit stop points in the housing? If so then how does the quarter turn change that?