I guess nothing is free in life. As I was converting my 1995 Team Marin from 8 speed to 9 speed for my son, I learned that you cannot use the Shimano XT RD-M773 Dyna rear derailleur with a 9 speed shifter (XT, XTR, LX or SLX). RD-M772 and RD-M773 look very close and similar but looks can be...