<!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 6.00.6000.16544" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Tahoma size=2>    Tom, I can't imagine pins "slipping" when they're as tight as you describe.  I'd start looking for other reasons for the pitch drop.  String problems like the lower end unwinding, bridge problems, hitch pins bending, plate separating from the back, anything that might explain the pitch change.  I think you'll get lots of comments on this one!</FONT></DIV> <DIV><FONT face=Tahoma size=2>    Mike Kurta</FONT></DIV></BODY></HTML>