I just got a set of Rinehart pipes. Just wondering if anyone else had issues getting these installed. They are going on a 89 FXSTC, problem I have is the rear pipe is too close to the rear axle nut, I'm not sure if I need to put spacers between the frame and the bracket that the pipes mount to. So far I have just loosely fitted them, but thinking when everything it tightened down, it will be worse. Any thoughts?