Several of my revlovers get alot of rds thru them. They get parts replaced as required. Once the end of the yoke is cut true and square and the the bearing surface in the cylinder is recut to remove any groove from the yoke, they get shimmed. That really helps keep endshake in spec. Some guns need the yoke/frame shimmed also. Hands and cylinder stops get replaced as the timing gets unacceptably "slow" or the stop is beat to death. If you shoot mostly DA (fast is worst in terms of wear) the hands do wear and the cylinder stop really takes a beating. Probably what matters most in terms of longevity is setting the endshake by trueing and shimming. My 2 cents.