Greetings, Newton writes, and I agree with << You key dip of .450" is a bit deep. Start with a dip of .390" (10 mm) and change it -.010" or +.020". Then Newton writes, and I must question: >>Deeper dip can produce a bit more power but the price for that gain is too high except for strong performance level pianists. >> IF the deeper dip allows a longer hammer blow to be had , then yes. However, if the hammer blow is not changed, but the dip merely deepened, I fail to see how there could be more power available. Wondering, Ed Foote
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