<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=US-ASCII"> <META content="MSHTML 6.00.2900.2668" name=GENERATOR></HEAD> <BODY id=role_body style="FONT-SIZE: 10pt; COLOR: #000000; FONT-FAMILY: = Arial" bottomMargin=7 leftMargin=7 topMargin=7 rightMargin=7><FONT id=rol= e_document face=Arial color=#000000 size=2> <DIV> <DIV>  <FONT size=3>Calin</FONT></DIV> <DIV><FONT size=3> As I said ,I'm no expert but the ribs I took off t= he old board were absolutely not crowned & IMO under designed for strength</FONT></DIV> <DIV><FONT size=3></FONT> </DIV> <DIV><FONT size=3>Dale</FONT></DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><= FONT style="BACKGROUND-COLOR: transparent" face=Arial color=#000000 size= =2> <DIV dir=ltr>Dale, are you sure Bluthner used compression crowning in th= e beginning? I remember reading something about rib crowning in an old book written by one of the Bluthners.</DIV> <DIV dir=ltr>Some makers did use rib crowning even in the 19th century, = but I have no idea how to find out which.</DIV> <DIV dir=ltr> </DIV> <DIV> </DIV> <DIV dir=ltr> Calin Tantareanu</DIV></FONT></BLOCKQUOTE></DIV> <DIV></DIV> <DIV> </DIV></FONT></BODY></HTML>