Greetings from the rapidly thawing Canadian prairie! Further to the discussion on pinblock fitting, could someone comment on Yamaha's official position on this issue? A colleague of mine has a client whose C3 has a gap between block and flange tapering from 33 thou in the bass to about 11 thou in the treble. The piano apparently suffers from tuning instability despite proper humidity control (Dampp Chaser) and frequent tuning. When brought to Yamaha's attention, the official factory response was that the gap was "within tolerance". Is there such a tolerance for pinblock fit? To me, it either contacts the flange or it doesn't. Regards to all, Stan Kroeker Registered Piano Technician
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