Ok, that is a good point. I just got my 78 inch EF Extra this morning and it will be a while before it is going to fly. In the mean time, no reason not to try the sticky sandpaper and run it on my test stand before I go modify anything. Another thought I had is to put some release agent on the Syssa thrust washer, shaft, etc and then after roughing it up with some sandpaper, add some JB weld or similar and "grow" some teeth on it. That way, no fibers are cut and it would be clean and easy and have perfect engagement.