In rigging up my Revolution I had the need to mount some items to the Trac without using the knobs. I had to make my own backing plates so I could use screws instead of the knobs. I cut down some 1/8 inch thick alum to 1/2 inch strips, cut them to length, then tapped the strips to accept screws. I don't know if the thin taps are going hold up over time, but if you don't over tighten they should last. I am looking for some 1/8 thick by 1/2 inch stainless strips which may be better, if I can tap them. You have to make sure to trim the bolts also to the correct length so they don't touch the Trac when tightened.