<!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 6.00.2900.2180" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Hi everybody,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I wonder what kind of device you use = for levelling keys.</FONT></DIV> <DIV><FONT face=Arial size=2>I use the aluminium yamaha straight = edge which is very handy and practical.</FONT></DIV> <DIV><FONT face=Arial size=2>But I've noticed that it is not as = straight as it was when new.</FONT></DIV> <DIV><FONT face=Arial size=2>It has warped a little since I bought it.</FONT></DIV> <DIV><FONT face=Arial size=2>So I'm considering in buying a new one.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Or is there a way to accurately make = one that will harldy warp or loose its "straightness"?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>A guy I know who went to the Yamaha = Academy in Japan told me that they were selling another type of straight edge there.</FONT></DIV> <DIV><FONT face=Arial size=2>It consists of a wooden core, and two = plexiglas bars glued to the wooden core (making sort of a "wood & plexi" sandwich).</FONT></DIV> <DIV><FONT face=Arial size=2>And then it is calibrated with a = machine so it is straight.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Maybe there is a way to build the same = edge with good accuracy.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Thanks,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Quentin</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV></BODY></HTML>