Vince: I don't know how to repeat what was said in a previous post without typing it, so if you will send this out to the rest of the subscribers, I bet some would appreciate it. A "D" inherently has more inertia problems because of its longer keys. They obviously have more mass than shorter keys to accelerate and the problem is exacerbated by the fact that the back check and key leads are mounted farther from the center of rotation for the key than in shorter keys (mo- ment of inertia is equal to the square of the distance from the center of rotation). Before I give you any suggestions for the piano, tell me if you have replaced any parts other than knuckles and, in general, what you have done with the instrument. See Ya.
This PTG archive page provided courtesy of Moy Piano Service, LLC