I'm getting ready to upgrade from my old Campy 8-speed (pre-1997) to Campy 10 speed. I can get 2006 Centaur shifters and derailleur at a reasonable price but for a few dollars more I can get 2007 Centaur components with something called "Quick Shift". I searched around but couldn't get a definitive answer. Can someone explain what this is? Will I still be able to use Shimano cassettes with a Jtek Shiftmate? Thanks.