I have been running the Power clutch system on my RB ws7II for about 3 months and it works great. The only thing is you need to follow the instructions that come with it. You must put a little Blue lock tight on the adjusting nut so it dosent screw it self down. I run the rulon shoes with the middle hardest spring. they wear pretty good. The teflon shoes i just instaled i will try them this weekend and and give a report on how good or bad the work.