<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content="text/html; charset=iso-8859-1" = http-equiv=Content-Type> <META content="MSHTML 5.00.3700.6699" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Jim,</FONT></DIV> <DIV> </DIV> <DIV><FONT face=Arial size=2>Your calculations assume all strings = will exert an identical force on the bridge. As their respective tensions will vary = greatly, so will the downbearing force. Am I missing somehing?</FONT></DIV> <DIV> </DIV> <DIV><FONT face=Arial size=2>cheers</FONT></DIV> <DIV> </DIV> <DIV><FONT face=Arial size=2>Jean-Jacques = Granas</FONT></DIV></BODY></HTML>