<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">This would tend to support the idea that it's acids in the wood causing the expansion (ie. the keys were made of a different wood than the back action).<div><br></div><div>I see countless old keys over here with expanding leads; everything from Bechsteins to Steinways to Erards to Pleyels, etc etc. You name it. I disagree with the idea (that someone proposed) that this is an uncommon phenomenon.<br><div><br></div><div>AW</div><div>London, UK</div><div><br><div><div>On Mar 13, 2013, at 6:00 PM, <a href="mailto:pianotech-request@ptg.org">pianotech-request@ptg.org</a> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; ">Message: 3<br>Date: Wed, 13 Mar 2013 09:45:50 -0700<br>From: David Andersen <<a href="mailto:david@davidandersenpianos.com">david@davidandersenpianos.com</a>><br>To:<span class="Apple-converted-space"> </span><a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a><br>Subject: Re: [pianotech] Expanding leads<br>Message-ID:<br><span class="Apple-tab-span" style="white-space: pre; "> </span><<a href="mailto:D995219B-03A6-489D-8F5F-1CAB74C7B27F@davidandersenpianos.com">D995219B-03A6-489D-8F5F-1CAB74C7B27F@davidandersenpianos.com</a>><br>Content-Type: text/plain; charset="windows-1252"<br><br>We had a 1942 Hamburg B we rebuilt that had expanded lead in the back action ONLY. We drilled it out and replaced?.had lived in South Africa for 60 years prior to SoCal?.<br>DA<br></span></blockquote></div><br></div></div></body></html>