Has anyone used one of these? I scratched my rotor when trying to break the bead on my front tire. I can probably polish the scratches out, as they are not deep, but while checking on factory rotor prices, I found one of these for a little less money. On the Sprint forum, there is some discussion about the application list being wrong on the Galfer site. Has anyone either experience with these or other brands they would care to share with the rest of us?