[pianotech] balance hole jig

[Ed Foote]

>>Will's punching idea sounds good.   Some favor the front of the hole on 

placing the new hole, I think, on the theory that the back of the hole 
takes the beating. But this introduces slop, which starts the whole 
thing down the guessing game route. Other than Will's idea, which sounds 
doable, I'll have to chew on this.   Other ideas out there?


Greetings, 
    I don't know why, but it seems that most of the oval is caused by pushing the keys distally.  This may be from 
the fingers, the geometry, or people pushing on the front,  or whatever, but it seems that 98% of my repair uses the shim of veneer on the proximal side of the hole. 
    I check by moving the key back and forth on the pin and see where it lines up with its neighbors.  It is usually clearly in one direction or the other, only occasionally needing shims front and back. 
Regards, 
Ed Foote RPT
http://www.piano-tuners.org/edfoote/well_tempered_piano.html


 
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