So the original call I got on this machine was a beeping noise. I never noticed it. I heard the chattering noise that the bulletin says is a spring, and the squealing noise that the bushing fixes. While installing that bushing today I did hear the beeping. It comes from the DF-470 finisher. Anyone know of a way to disable the beeping? or is it not an actual beep and something in the finisher that makes a similar noise.