I have been using pinblock plugs when needed for over 15 years. No problems yet. The tuner can't tell from new block. I use 1/2 inch plugs made of delignet that I cut myself. I use epoxy to put them in place. The reason I only do this sometimes is that the procedure takes longer than making a new block. Usually I reserve the plugs for Chickering 4-part blocks, uprights, and mortised blocks. I often drill these out in the piano, especially the blocks that I don't remove! if the pinblock is full of sawdust, delaminating, or has other prohibitive structural weaknesses, make a new block. I only do it to save time. Steve Ganz RPT
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