Anne, We didn't calculate string tensions - just used a micrometer to match the dimensions to Malcolm Rose wire for the pianos of this era. Is this an incomplete way of doing it? Thank you. Mark <div> </div> ---------- <pre>Mark, You don't need to bash these pins in, nor should they be anywhere near as tight as in a modern piano. The tensions on the strings are not as high as for a modern piano. I trust you did your homework and analyzed the original wire and calculated out what the tensions and strains should be for A435? You shouldn't need a pinblock support unless you feel the need to bash too-tight of pins in really hard. aa From: "Mark McConnell" <<a href="https://www.moypiano.com/resources/#archives">mconnell1 at instruction.com</a>> [ Save Address ] Reply-to: Pianotech List <<a href="https://www.moypiano.com/resources/#archives">pianotech at ptg.org</a>> To: <a href="https://www.moypiano.com/resources/#archives">pianotech at ptg.org</a> Subject: pinblock support in square grand Date: Sat, 22 Mar 2008 23:17:15 -0500 I am assisting a tech in restringing a circa 1840 square grand. There doesn't seem to be any way to use a pinblock support when hammering in the new pins, since the case is built around the block. Should I assume support is not needed? Does anyone have any experience with these? Thank you. Mark -- Anne Beetem Acker Historic Keyboard Specialist <a href="http://www.pianogrands.com/">http://www.pianogrands.com</a> <a href="http://www.anneackerkeyboards.com/">http://www.anneackerkeyboards.com</a> 912-704-3048 mobile</pre> -- <div> Want an e-mail address like mine? Get a free e-mail account today at <a href="http://www.mail.com/Product.aspx" target="_blank">www.mail.com</a>!</div>