<HTML>Dear List, A customer of mine has a very old M&H Grand with a new soundboard that has me, and the rebuilder's head technician, stumped. It is resonating at all the partials in the overtone series of one note.  It's not the string tails, and not the spider.  It is loudest in the curve of the case. Newton tried to put me in touch with someone, but I haven't been able to find the fellow. If someone well versed in soundboard theory would contact me, I'd be much obliged. Karin Schmitt-Read Karintunes@aol.com Florida Keys/Key West</HTML>