Well I can gurantee that the metal on metal won't last 1 run. Infact, I would probably be willing to put money on it...Hardened steel against non-hardened steel WON'T LAST. Theres a few pictures around here of what happens with metal on metal. If you setup the MGT slipper you had right, then it should last no problem. If it doesn't, your only choice is the Strobe or a Kippster...