List, I am reviewing some fundamental principles in downweight/upweight [UW/DW] concepts and have come across a minor puzzle in this older vintage grand piano. Two notes: 1) one reads 48 grams DW, 28 grams UW 2) one reads 56 grams DW, 28 grams UW My interest was to have the 56 gram DW number be closer to the 48 gram UW number without adversely affecting the 28 gram UW number. However, this is where my minor puzzle begins. Some information: Hammer flange pinning is equal on both, wippen flange pinning is equal on both, capstan to wippen heel appears to be satisfactory, knuckle/rep lever appears to be okay. And there is freedom in the key bushings. Additional information: The weights of the hammershank assemblies of both notes respectively are 16.4 grams 16.1 grams. The weights of the wippens assemblies of both notes respectively are 20.1 grams 20.8 grams. I seem to be unable to accomplish my interest. Any ideas? At your convenience, Keith McGavern Registered Piano Technician Oklahoma Chapter 731 Piano Technicians Guild USA
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