something doesnt add up here... how did you break 2 of them? i would have thought you would stop after the first one? or did they break at the same time? did you tighten them all evenly?
well hmmm were tightening one of them when it broke? it seems like maybe you had uneven pressure on it and the clutch springs are what broke it. either way your lucky it didnt break while you were running it... that might of got ugly