I've been getting familiar with my machine since finishing the re-fresh and the noisiest part of the machine is the QCGB. I found that it's the loudest when the arm is closest to the left end. Must be a build up of slop way over there. It's best on the right end, actually third from the end to my ear so that's where I plan on keeping it unless I need a certain thread. Is that what you all do? Also I fiddled with the set screws and nut that provide some kind of adjustment and quieted it down some. Is it better to make the adjustment with the top mounting screws loosened up? Any other tricks?