>>1. What is the efficacy and/or effectivenss in brushing (vigorously) the whippen heel cushion<< It always made me feel better about not replacing them. >>2. What is the relative effectiveness of bolstering knuckles with yarn, vice knucle replacement Hmm, if the knuckles are worn out, then so are the hammers, and usually the pinning. I vote replace. Replace just the knuckle, if the other factors are ok, but I don't bolster anymore, and the ones that I did always had some inconsistancy in their let-off feel. >>3. What, if any, is the "rule of thumb" in determining the limits of reshapability of badly worn hammers > I would think that when 30 % of their weight is gone, they are toast. Usually the C4-C6 octave is the most heavily worn area, and when there is less than half the original felt above the core, it is beyond use. Regards, Ed Foote RPT
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