Just to add to this thread rather than start a new one – i fitted the medium of the 3 spacers to the fox evolution rl on my 2012 Five this week. Before this i was finding that with the right amount of sag for my preferred set up of about 1/3 travel the shock would blow through its travel and bottom out on bigger hits and big compressions but running the shock any harder would have the back end skipping around more than i’d like, i phoned Mojo who were very helpfull and the bloke in the workshop who i spoke to also ran a five and had a medium spacer fitted so i ordered the kit.
The job of fitting the spacer was easy as, didn’t even bother taking the shock off the bike to do it, had it’s first proper ride yesterday on some local dh tracks and found that with the medium spacer fitted (i’m about 14st kitted up) i was able to run 1/3 sag without it bottoming out even on bigger drops, was running near on to full travel as i’d expect on the bigger stuff but without the harsh bottom out, job done and no expensive custom tune required, happy with that for less than £20.