<!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 6.00.2900.3132" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial>FWIW: Here's a picture of how straight I was able to get that Delignit capped block where the base was initially arced.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><IMG alt="" hspace=0 src="cid:000901c7dd2e$70dd8bb0$0201a8c0@DESKTOP" align=baseline border=0></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV style="FONT: 10pt arial">----- Original Message ----- <DIV style="BACKGROUND: #e4e4e4; font-color: black"><B>SNIP</B></DIV></DIV><FONT face=Arial size=2> <DIV><FONT size=3>\</FONT><FONT size=3>I can only guess that the proper reverse curve to put in the base with a single 8 mm thick cap would be maybe double my 3.5 mm reverse curve - or about 7 mm or so (three laminations will have less springback than two). But that's just a guess. So if I were to try and state some kind of rule to use when this happens, with the very little bit of data I have - or have estimated, it might be to bond the cap to a reversed curve on the base that is 1/3 the height of the unstressed warp/bow/curve. That's probably what I'll try next time I make another capped block.</FONT></DIV> <DIV><FONT size=3></FONT> </DIV> <DIV><FONT size=3>Terry Farrell</FONT></DIV> <DIV><FONT size=3>Farrell Piano</FONT></FONT></DIV></BODY></HTML>