FWIW, I too "recrown" soundboards. I have many out there that span 25 years, (on my own)(Previously w/Del). So far the boards are holding just fine. Although, I do think that "re-crowning" is not the ultimate and some times will not work, it is a viable alternative to trashing an otherwise decent "Family Piano". The most difficult "Re-crowning" I have done, to date, was on a "Strung Back" Orchestrion. When this thing came to me, some one else had "fiddled" with it. It was a mess. The board had a definate "reverse" crown and negative downbearing throughout. When it left my shop, it had adequate down-bearing, (and I did not reposition the plate!), and a "crown" throughout the board. This was a few years ago and I would bet that it is still just fine. The next time I get up to the San Juans, I plan on dropping in to check on it. That's my story, and I'm stickin' to it! [G] Best Regards, Joe Garrett, RPT, (Oregon)
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