>There is a .4 change in action ratio either up or down when the half >punching or balance rail veneer is used to help correct a high or low R I think you mean .04 change. I have use b/r shims twice to lower KR (moving the fulcrum back) and friction. It was used because nothing else worked satisfactorily. -- Regards, Jon Page -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/20071002/5815b79e/attachment.html
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