<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 10 (filtered)"> <style>  </style> </head> <body lang=EN-US link=blue vlink=purple id="role_body" bottomMargin=7 leftmargin=7 topmargin=7 rightMargin=7> <div class=Section1> The sharps are actually the correct height. You should raise the naturals to the original height then the relationship to the sharps will be okay. You will also need to add punchings to the front rail to keep the dip good. Then regulate as normal.   <div> Dean Dean May             cell 812.239.3359 PianoRebuilders.com   812.235.5272 Terre Haute IN  47802 </div>   -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Byeway222@aol.com Sent: Tuesday, May 30, 2006 7:42 AM To: pianotech@ptg.org Subject: To:- All the Action Geometry Buffs   <div> Hello List, </div> <div> I recently posted on the subject of replacing white plastic key coverings with some very good one- piece ivory tops which I can salvage from an older  piano. </div> <div> Having thought this situation through, it is obvious that the ivory is going to be thinner than the original plastic.  This is going to leave the sharps looking too high.  I will, therefore , have to lower the height of the sharps at the balance rail and in turn alter the depth of touch on the sharps. The sharps and naturals will no longer have their original realtionship. </div> <div> My question to you all is, 'Am I getting into deep water with the action geometry by doing this, and am I likely to end up with a peculiar feel in the general touch?' </div> <div>   </div> <div> ric </div> <div>   </div> <div>   </div> <div>   </div> </div> </body> </html>