Thanks for the quick reply. The lack of notches is the problem plus the surface area of the collar is so narrow. I guess I will have to remove the shocks, clamp one end in a vice and then see if I can get a pair of vice grips on it. Problem is that I will have to keep putting it back on & off the bike until I get the proper sag. Ugh! I probably should just remove the knurled collar and see if I could get a notched adjustment collar.