<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I know of a grand piano that had the C/A treatment done.<div>It didn't work, so the person decided to have the pin block replaced.</div><div>On removing the old pin block, they discovered that the C/A had not penetrated to any extent, into the pin block. I just heard about this last week.</div><div>It was not a piano that I had worked on.</div><div>I had done a treatment on a same brand grand, and when I went back a year later, some were still not holding, so I applied more C/A, and did the tuning.</div><div>There was no extra charge for the additional application.</div><div>I have not heard back, so I am assuming that it is now ok. Mind you, I never heard back the first time, and wouldn't have known, but for the fact I was tuning again.</div><div>i always tell people to call me, if it doesn't seem to be working. Since they don't call, I am assuming that the 'fix' worked.</div><div>When in doubt, I suppose, removal of a tuning pin to check for penetration, might be a good idea.</div><div>Also it might be preferable to do the application of the C/A, when the house is at its driest, in January or February.</div><div>Doing it in the height of Summer, might not work due to the higher moisture content of the block.</div><div>John Ross</div><div>Windsor, Nova Scotia.<br><div><div>On 11-11-2011, at 11:12 AM, David Love wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Drilling the holes is probably unnecessary and may even be<br>counterproductive.  There is certainly enough of a gap between the plate<br>bushings and the pin to allow a thin viscosity CA glue to penetrate down to<br>the block and spread around the base of the pin.  Drilling a hole is not<br>only not necessary but might actually disrupt the natural flow of the CA<br>around the base of the pin depending on where it is that the hole actually<br>penetrates through the bottom of the bushing.  Just lay the piano on its<br>back and forget the holes that you've just spent  all that time drilling and<br>with a fine needle applicator apply the CA toward the back of the pin where<br>there is most likely the largest gap.  Because some pooling might occur I'd<br>let the piano sit overnight or at least for a couple of hours before<br>standing it back up.   <br><br>David Love<br><a href="http://www.davidlovepianos.com">www.davidlovepianos.com</a><br><br><br>-----Original Message-----<br>From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf<br>Of Leslie Bartlett<br>Sent: Thursday, November 10, 2011 8:16 PM<br>To: pianotech@ptg.org<br>Subject: Re: [pianotech] help please<br><br>Upright piano...............................<br><br>-----Original Message-----<br>From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf<br>Of Ron Nossaman<br>Sent: Thursday, November 10, 2011 10:01 PM<br>To: pianotech@ptg.org<br>Subject: Re: [pianotech] help please<br><br>On 11/10/2011 8:53 PM, Greg Newell wrote:<br><blockquote type="cite">I'm confused here. It looks like you've drilled every one. How is that<br></blockquote><blockquote type="cite">somehow better or less time consuming than just flipping the piano over<br></blockquote>with<br><blockquote type="cite">action removed and applying CA from the underside of the block? It seems<br></blockquote>to<br><blockquote type="cite">me like a better way to apply too since you're putting the CA directly<br></blockquote>onto<br><blockquote type="cite">the pin/block contact with little chance of gluing the block to the plate<br></blockquote>as<br><blockquote type="cite">was described in a thread a bit ago.<br></blockquote><br>Suit yourself but, the very last place I want the pins tight is at the <br>bottom of the hole.<br>Ron N<br>-----<br>No virus found in this message.<br>Checked by AVG - www.avg.com<br>Version: 2012.0.1869 / Virus Database: 2092/4608 - Release Date: 11/10/11<br>-----<br>No virus found in this message.<br>Checked by AVG - www.avg.com<br>Version: 2012.0.1869 / Virus Database: 2092/4608 - Release Date: 11/10/11<br><br></div></blockquote></div><br></div></body></html>