I just picked up a used Fox Shock for the F3 and I am wondering if anyone who has this shock (and the installation instructions that I lack) can tell me the maximum safe length of the shock. That is, with the lock nut secured, how many threads or how many millimeters can there be between the bottom of the lock nut and the first thread of the bottom eyelet? I tried emailing Fox directly but no response. Does anyone have this information? Thanks!