Went to rebuild my 40RC2 once again, and ran into the same problem I have before. The damper cartridge won't sit down enough to tighten the bottom nut down. I am only blessed with a few threads to work with. When I tighten with these few threads, the entire cartridge spins and thus I can't tighten more than a few 1/4 turns. I tried putting the low speed adjuster on to give me something to help keep it stationary when tightening it. No Luck. I really don't want to send the thing back to Fox, AGAIN. Any one out there with some experience, maybe some troubleshooting points?