I just got my lefty 140 TPC back after a rebuild. It was leaking oil from the bottom so it was returned and fixed under warranty. When I got the bike home the rebound knob didn't work at all. After taking the top cap I found the shock was not completely reset (it needed the bearing migration reset done it was out 3/4") and they (the factory) lost both of the small bearing that fit into the red rebound knob. I know they were there when it was sent because I reset the shock often and always make sure not to lose them. Well anyway I got the rebound fixed myself (they must have overtighted the knob) and it works again. One good thing I didn't have to pay a thing for the rebuild not even shipping. My LBS is awesome, I have never heard of any bike shop that takes such good care of me as the one hear. My question is should I even get those two little rebound bearings? It seems to work just fine without them.