FWIW: Here's a picture of how straight I was able to get that Delignit capped block where the base was initially arced. ----- Original Message ----- SNIP \I can only guess that the proper reverse curve to put in the base with a single 8 mm thick cap would be maybe double my 3.5 mm reverse curve - or about 7 mm or so (three laminations will have less springback than two). But that's just a guess. So if I were to try and state some kind of rule to use when this happens, with the very little bit of data I have - or have estimated, it might be to bond the cap to a reversed curve on the base that is 1/3 the height of the unstressed warp/bow/curve. That's probably what I'll try next time I make another capped block. Terry Farrell Farrell Piano -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20070812/72c6bf2f/attachment-0001.html -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 40077 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20070812/72c6bf2f/attachment-0001.jpe
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