Guys, after changing from an XT hollowtech ll crankset to an FSA powerpro set, my XT f/mech refused to shift onto the granny ring, middle and outer were fine but would only shift to the granny if I gave it a tap to help it along!Consulted my LBS and was advised to change the mech and that the prob was wear and tear blah blah blah.Got the bike back this morning with new XT mech and cable plus the old mech and I can't see any real signs or wear, no play in the spring and it's still nice and tight? Is it worh keeping this mech as I intend to use the XT c/set on my next project and the mech has worked fine with it for the last 2 years. Thanks for your help, all replies appreciated. GAZ.