Once you have learned something it is impossible to leave well enough alone. At Rutgers I would apply all I knew about actions when I restored an action with new parts, bushings, felts and other such. There is no such thing as perfection but some things can be improved far, far beyond the designers dreams or factory capabilities. The chart from David makes it easy to weigh out. I use a quadratic solver to derive the deviations and plug those values into a spread sheet and that produces a set of hammer and later key weights. > > So the Stanwood Precision TouchDesign is really only meant for pianos that > > can't be properly regulated? Newton
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