<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <META content="MSHTML 6.00.2719.2200" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#d8d0c8> <DIV><FONT face=Arial size=2>David,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Just two questions.</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV><FONT size=2>Action ratio is equal to </FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2><U>blow distance - letoff</U> </FONT></DIV> <DIV><FONT size=2>key dip - after touch </FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>By increasing the spread you will lower the action = ratio.  A lower action ratio will mean that the piano will = require deeper dip.  Or, in your case, you will have less = aftertouch.   Before doing this, you will have to make sure that altering the spread = doesn't create other problems especially in terms of jack/knuckle alignment.  </FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>The other alternative is to reduce the blow = distance.  </FONT></DIV> <DIV><FONT size=2></FONT> </DIV></BLOCKQUOTE> <DIV><FONT size=2>If I follow you, didn't you mean increase the blow = distance (in order to reduce the aftertouch for the same key dip and same action = ratio) ?</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>Can I ask you how you define a good aftertouch ? By = feel at the key ? by precise measuring (at the key or at the jack) ? = </FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>And indeed, do you feel it is more important to keep = good alignment between jack and knucle core, and therefor altering = preferrably the hammer blow ?</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>Thanks for your expert advises.</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>Stéphane Collin.</FONT></DIV></BODY></HTML>