Hi John: I have a collection of those wooden bushings that I never seem to use. My thought would be this: If the caster plate fits into the recess where the old caster was, put screws in to hold it in place, tap the caster into the socket and call it good. I don't think you will have any problem. I have installed over 40 sets this way with no failures. Mike Kurta
This PTG archive page provided courtesy of Moy Piano Service, LLC