A simple experiment will tell you about hammer shank effect: Take an action with round hammer shanks and replace one shank with "hex" shank, of your choosing. Put the original hammer on the "hex" shank. Align perfectly as it was before. Put the action in the piano and listen. My experience is/was that the "hex" shank has a harder sound. K? Best Regards, Joe Garrett, RPT, (Oregon) Been There, Didn't Like It, So I'm Here To Stay! [G}
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