<!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 5.50.4134.600" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>I guess I should have been more = specific. This is a 1933 grand action  with no drop screw. I found that with too much = spring tension let-off does not "feel" right and the hammer will bubble. (makes = sense). Let off adjustment is done with the action removed. I guess my question = is how much spring tension is right to get the proper repetetion? I have it = playing fairly well as all the other procedures are about the same.My research = showed this action was discontinued in the 70's or 80's.</FONT></DIV> <DIV><FONT face=Arial size=2>Thanks.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Jon</FONT></DIV></BODY></HTML>