Hmm, well I can tell you what's NOT a good idea and that's the metal tuning pin "sleeves" sold for the purpose by suppliers! Using larger pins might work, as might sandpaper shim or veneer shim. But it partly depends on what's going on in the pinblock. If there is a crack thrugh several layers of lamination, for example, that's causing a line of pins to be slack, using shims may only force the crack wider. CA might be a good idea. an easy fix if it works. Can be done without putting the piano on its back, but maybe not feasible if coils touching bushing.
Best regards,
David.
>I tuned an old upright today. About half a dozen or so of the pins were untunable. When I released my hand from the hammer, the pin jumped back down and the tone >went considerably flat.
>What would be a temporary fix here? Would changing those pins with a size or two higher be a temporary remedy? The coils are already touching the bushing, so I >guess tapping the pins would not be a good idea.
>Any thoughts please?
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