> Can anyone... explain just HOW they work They're handled straight rods about 75mm long. Tip is tapered, and the shank is roughened toward the handle. I haven't needed to check diameters, they're labelled accurately for corresponding pin sizes. Periodically they need relabelling, best to scratch, etch or punch numbers into the wood. Usually I go through a whole set of flanges, old or new, checking friction in each assembly with a little torque scale, and checking whether both sides are equally snug. By the third or fourth one, I find an average replacement pin size (I don't measure every old pin) - to make sure of fitting, I check insertion resistance with a pin for each bushing; often one side needs more reaming than the other. Repin, check again with scale, install. A table at the right height saves a lot of motion. Clark
This PTG archive page provided courtesy of Moy Piano Service, LLC