Hello, Thought I would ask another question. Everyone one on this bulletin board has been friendly and VERY helpful. I do however have one more issue I most take care of. I realized my rear pulley's port and starboard need to be replaced. I thought I would just unscrew them but then realized there must be a nut on the back side. Has anyone crawled WAY back inside their MAC to replace these two parts? Or is there a easier way?-Steve