I also know of a Yamaha C7, I could fold by business card in half and slide in the gap along the full length of the flange. Never seen quite a gap. Seemed to tune very well until one day I had to raise the pitch somewhat, felt like it was shifting in an unusual way. David Renaud. Stan Kroeker wrote: > 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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