I just had the new saint derailleur installed on my bike last week. While it shifted great and made little slapping noise in the parking lot, it barely held up to one day at Northstar. I ran it most of the day in the highest gear and clutch on. First run down, my cable snapped. I've read that this has happened to a few people, so no problem...another fresh cable. Next, the high speed adjustment screw divots the shoulder of the derailleur that it seats against to the point the chain is grinding on the cage and frame. I ran it the rest of the day in the middle of the cassette. Anyone experience this, or has a solution?