Robin Hufford wrote: > John, > I know you attempt to approximate I here for the keystick and the result > you arrive at here may be adequate for this yet I would suggest a fairly > better measure for the mass moment of inertia for the keystick itself can be > arrived at relatively easily with a little more effort. Thanks Robin, A drawing of this would be helpful. For now I am going to save your post for future reference. To use this method would we have to remove any key leads first? General speaking the center of balance of an un-leaded key is close to the balance hole, at least on natural keys of a grand piano. John Hartman RPT John Hartman Pianos [link redacted at request of site owner - Jul 25, 2015] Rebuilding Steinway and Mason & Hamlin Grand Pianos Since 1979 Piano Technicians Journal Journal Illustrator/Contributing Editor [link redacted at request of site owner - Jul 25, 2015]
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