<!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 6.00.2900.2180" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Hi Jim,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>thanks for your link.</FONT></DIV> <DIV><FONT face=Arial size=2>From the first sight, the only = difference I can see is a spring between the jack and the hammer butt and a spring going from = the hammer butt to the damper rail.</FONT></DIV> <DIV><FONT face=Arial size=2>Can they be regulated with a = screw? What are these springs supposed to do? Help the jack to return = under the butt quicker and easier?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Quentin</FONT></DIV></BODY></HTML>