<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <META content="MSHTML 6.00.2600.0" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV>Hi Terry,</DIV> <DIV> </DIV> <DIV> </DIV> <DIV>In drying out sound boards one method is to draw a pencil line = accross the board against the grain, mark out a specific length 1M or 4', place = board in oven (or however you are doing it) and when measurement has srunk by 1.5 = CM or 1" the board is ready for assembly.  MEASUREMENTS ARE NOT ACCURATE. = ONLY AN INDICATION.</DIV> <DIV> </DIV> <DIV>This is the method once used by a piano manufacturer in Sydney Australia.  I think it was Bently, ask Ron Overs, he may have the formula.</DIV> <DIV> </DIV> <DIV>If you know what the MC of the timber is to start with you can work = out the what the shrink amount would be when the board is reduced to 6.5 MC completely.  By useing a humidity setting (even if accurate, you = would still have to leave the board there for a specific time.</DIV> <DIV> </DIV> <DIV>Regards</DIV> <DIV> </DIV> <DIV> </DIV> <DIV>Tony Caught</DIV> <DIV> </DIV></BODY></HTML>