Joe, Well, to get another handle on the statistics here, how many *original* pinblocks have you seen that were *not* drilled all the way through? I assume we're talking about grand pianos. If 99% of the pinblocks from the manufacturers are drilled all the way through, then this statistic doesn't really tell us anything. Now to follow a related rabbit trail a little how many *vertical* piano pinblocks are drilled all the way through? Or, if they are, maybe I should ask, is there ever open space behind a vertical pinblock, or is it screwed/glued to a solid panel? I've never rebuilt a piano, so I don't get to examine the "guts" the way some of you do, but I've run into a situation where I tried to tap some tuning pins in a vertical a little deeper, and it definitely felt like they hit bottom when there was still room at the coil. If vertical pianos in general are *not* drilled all the way through, then following Joe's logic we should have a lot fewer failing pinblocks on verticals than on drilled-through grands. I'm not sure that's the case. I hope to learn something today. <G> BTW, here in southeast Pennsylvania we are having a prolonged rainy spell. Our rain gauge shows only an inch so far, but we're hopeful for more today. Regards, Clyde Hollinger Joseph Garrett wrote: > As I do not drill > all the way through my pinblocks, but simply "dimple" them, like we do for > upright hammers. This dimple is to relieve the hydrolic pressure of the Pin > Driving fluid. As I firmly believe that a completely sealed pinblock will > last longer, this > is how I do it. (99% of the pinblocks I've had to replace were drilled all > the way through.)
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