<!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 6.00.2900.2523" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Hi Andre,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I was not talking of the plastic and = acetone method, but the ping-pong balls+ acetone mixture.</FONT></DIV> <DIV><FONT face=Arial size=2>According to the Yamaha Staff, it works = in 5mn with 2 drops on the crown.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>About getting a brighter sound : what = can you do if a pianist wants the sound to be brighter, even if you think that the = hammers are bright enough?</FONT></DIV> <DIV><FONT face=Arial size=2>I mean, logically, you can't needle and = needle again, or your hammers will loose all their tension in a short time, right?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>So, what would be the solution: using = hardeners in some cases, or having two actions for one piano: one with very bright = hammers, and one with "regular" hammers?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Quentin</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Quentin</FONT></DIV></BODY></HTML>