I just changed mine. I also replaced the gears but honestly the original ones did not look much different than new except for a small chip or two, so they are in the spares box not the can. The spring I got from GoFasters was a couple mm longer, not sure if by design or because the old one was starting to sack. It feels the same moving it through the stroke by hand. If it slips again I'll preload the spring with some shims against the case, there is room to play with.