I always turn the plate over and put a few drops of penetrating oil in the agraffe holes from behind, and let them soak for a day before attempting to turn. ("P.B. Blaster" is probably best for this, as it also eats any corrosion a bit.) -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20120822/1a856677/attachment.htm>
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