David writes: << pinblock is screwed to the inner rim via a couple of plate screws that penetrate the block down to the rim) all the way to the stretcher why would you need to attach the pinblock to the stretcher to create case stability. >> I don't think it is a question of case stability, but rather, stiffness in the plate/block assembly. The attachment of the block to the stretcher assists the block in resisting movment of the strings in the vertical plane. These vibrations are quite small, but I consider them important, and without some vertical component to the "beam" that resists them, more energy is lost to heat than otherwise would be. It could be that the increased stiffness afforded by attaching the block to the stretcher would also increase the entrainment of the strings' vibration to the case. Regards, Ed Foote RPT http://www.uk-piano.org/edfoote/index.html www.uk-piano.org/edfoote/well_tempered_piano.html <BR><BR><BR>**************<BR>Looking for a car that's sporty, fun and fits in your budget? Read reviews on AOL Autos.<BR> (http://autos.aol.com/cars-BMW-128-2008/expert-review?ncid=aolaut00050000000017 )</HTML>
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