Ok i've had these marzocchi forks for like a month and now it's leaking fork oil from where the rebound adjust knob is screwed into the fork, i've tried tightening it but it keeps loosening off. I don't have the proper socket size so i'm not able to get it screaming tight but i've gotten it pretty damn tight and it still loosens off somehow there's an O-ring where it screws in and it looks fine. any help would be appreciated.