I have a 10 year old maximum 74, debated on replacement of entire unit, but after replacing control board, 2 sets of cables and various parts over the last couple of years I want to keep it, mount has taken the most abuse, the 2 main pins that hinge on the head and the base were rusted in, was able to drill out one, and replace, but other pin that has the other set of bushings is still rusted in, motor clunks every time I step on pedal, or slams around when it's on high, the main lock down keys are worn also, what I need is a new mount, or a the parts to do it.