<html> Hi Marshall,                   Once the board has gone as bad as you describe, there is only one real solution, replace the board. A few questions to confirm your diagnosis. Did you measure compound bearing to confirm bridge roll? Did  you measure the crown of the board, and how? To confirm the collapse. Is the board still glued to the inner rim? If not it may be fixable, but don't hold your breath. Are the inner and outer rims, securely glued together? I have encountered two pianos where the rims separated and gave the exact symptoms you describe. Both instruments were fixed. and are holding up just fine. In both cases, the rim let go at the first treble curve.  the rims were epoxyed and doweled back together. You need to get creative in making clamping cauls, to get things aligned and brought back together. Relative to the other problems, it was not such an expensive fix.Thin West System Epoxy was used as adhesive. To answer your other questions: Beside tuning stability problems, expect poor sustain, and false beats from the forward bridge pins. The value has been relegated to a high priced Rebuilders special, with this kind of problem. Providing it has a good action and case. I'm guessing, but it probably will cost $7,000 to replace the board. Hope this may help you. Regards Roger At 01:15 PM 2/4/01 -0800, you wrote: <blockquote type=cite cite>Does anyone have comments for this fellow? jeannie Jeannie Grassi, RPT Associate Editor, Piano Technicians Journal <a href="mailto:jgrassi@silverlink.net">mailto:jgrassi@silverlink.net</a> -----Original Message----- From: Marshall Theriault [<a href="mailto:litchfieldhill.piano@snet.net" eudora="autourl">mailto:litchfieldhill.piano@snet.net</a>] Sent: Saturday, February 03, 2001 8:26 AM To: jgrassi@silverlink.net Subject: PTG Journal Q&A A piano I service has a collapsed soundboard with a severe forward bridge roll.  Unisons are difficult to keep in tune from midrange to a little beyond the treble break. Can this be corrected, and how does it affect tone quality?  Also, since the piano is fairly expensive, would this situation have an adverse affect on value? Thank you. Marshall Theriault 88 North Chapel St. Torrington, CT 06790 860-489-0886 </blockquote> </html>