<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content="text/html; charset=iso-8859-1" = http-equiv=Content-Type> <META content="MSHTML 5.00.2919.6307" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT size=2>According to my SAT III, my tuning fork is 2.5 cents = flat.  I'm guessing that I can change this by filing something off = of the fork- do I take some from the upper ends, bottom end, middle? </FONT></DIV></BODY></HTML>