---------------------- multipart/alternative attachment Calin As I said ,I'm no expert but the ribs I took off the old board were absolutely not crowned & IMO under designed for strength Dale Dale, are you sure Bluthner used compression crowning in the beginning? I remember reading something about rib crowning in an old book written by one of the Bluthners. Some makers did use rib crowning even in the 19th century, but I have no idea how to find out which. Calin Tantareanu ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/26/17/51/5f/attachment.htm ---------------------- multipart/alternative attachment--
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