I think part of the problem is that I"m using the Salmon KoolStops and the new rims. I put the new rim on a bike with a newer set of brakes and pads (2006 Campy Centaur) and the brake/rim is quiet. I put a machined brake surface up against the new pad, and it too is quiet. Think I'm either A) going to get a set of black koolstop pads for these brakes, or B) Get a different set of brake pads & holders that will allow for toe in without bending the brake arms!