<!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 6.00.6000.16609" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>There's a lot of misleading information in the post you cite, and the quote is not from David Ilvedson.</FONT></DIV> <DIV><FONT face=Arial size=2>Chances are the cracks are appearing because of low humidity.</FONT></DIV> <DIV><FONT face=Arial size=2>What's the relative humidity by the piano?</FONT></DIV> <DIV><FONT face=Arial size=2>Best way to avoid damage is to control humidity, and if there's no buzzing, forget about the cracks.</FONT></DIV> <DIV><FONT face=Arial size=2>Ed Sutton</FONT></DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=hacicspe@gmail.com href="mailto:hacicspe@gmail.com">daniel carlton</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=pianotech@ptg.org href="mailto:pianotech@ptg.org">pianotech mailing list</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, February 15, 2008 1:25 AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> soundboard on my 1890's Knabe upright</DIV> <DIV><BR></DIV> <DIV>hey techs</DIV> <DIV> </DIV> <DIV>i've got a rebuilt (rebuilt 2 or 3 years ago) 1890's Knabe upright. nice warm, woody sound, and it's already been used in a few recordings. i'd like to have it sound nice for many more years. i do have one concern. i've noticed a crack or two in the soundboard, and it bums me out to have a rebuilt, beautifully sounding piano with a crack in the soundboard. </DIV> <DIV>now i did a few shims at nbss on grands we were rebuilding, but never any uprights... and in the following post <A href="https://www.moypiano.com/ptg/pianotech.php/2006-January/184497.html">https://www.moypiano.com/ptg/pianotech.php/2006-January/184497.html</A>, David Ilvedson says you can't shim from behind. </DIV> <DIV>so my question is can <EM>anything</EM> be done to fix the cracks?</DIV> <DIV> </DIV> <DIV>as always, any help is greatly appreciated.</DIV> <DIV> </DIV> <DIV>thanks</DIV> <DIV> </DIV> <DIV>daniel carlton</DIV></BLOCKQUOTE></BODY></HTML>