The rubber that is located between the Brotherhood Targets and Blackbird Launch (right side) on my X-Men Pro looks like it will be breaking any day now. I have replaced a few rubbers on this machine and others but this one looks rather difficult. Has anyone replaced this particular rubber? What are the steps needed to put a new one on (what do I have to take off)? Should the pf be raised? What is the rubber size? All information will be greatly appreciated.