Hi Al, If the block really is OK, and since I drill in the piano (obviously you will be too), I would recommend treating this situation as if you were doing a two pass drilling on a new block. That is, the first pass is already done, now you need to drill a couple tests to determine what torque you want. If it were me, I'd probably see if there wasn't an area up in the treble where I could drill a test hole or two that wouldn't compromise anything structurally. I'd think that only the block in the piano would give you an accurate test piece since you've none of the scrap. Once you figure out what size bit you want as your final size, chuck it in the press and then drill the entire block that way. Results should be very consistent. As far as pin size, I'd recommend the smallest that you can get away with while still drilling out every hole. My take, William R. Monroe On Fri, Oct 16, 2009 at 1:10 PM, Al Guecia/AlliedPianoCraft < AlliedPianoCraft at hotmail.com> wrote: > Hi All, > > I'm restringing a Chickering grand and was prepared to replace the > pinblock. I removed the plate and the pinblock is in great condition. Nice > white wood, no cracks or separation, so I have decided keep the existing > block. I removed 2/0 tuning pins. > > I'm looking for suggestions as to pinblock preparation. Ream/drill and go > up to 4/0, or just wire brush and use 3/0? Any thoughts on this would be > appreciated. I'm also open to any other suggestions. > > Al > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20091016/a134a9e1/attachment-0001.htm>
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