<!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 6.00.2800.1141" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY lang=EN-US vLink=#800080 link=#0000ff bgColor=#ffffff> <DIV><FONT size=2>I have the same problem on my U1.  I've had the = balance rail shimmed, and it doesn't help.  A few years ago, I discovered = that many of the flange cords had broken, and thought that might be the = problem.  When I had them replaced, the tension on them was very uneven.  You = could tell just by looking, since the size of the loops was all over the place.</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>Could this uneven or incorrect hammer return spring = tension be a factor?  I notice it most playing pp, with una corda, = especially on sharps played close to the fallboard.</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>--Cy Shuster--</FONT></DIV> <DIV><FONT size=2>Rochester, MN</FONT></DIV></BODY></HTML>