I have the 13 inch Saleen Brembo slotted rotors and calipers. I dont usually get on the brakes hard. The other week i went to a road race track and used them hard. Everything was still good until a couple weeks later. At first it started with slowing down from high speed on the hwy 70+ the steering wheel would shake a little. Now it does it really bad and started doing it from 50mph+. Arent these expensive rotors made to handle heat and hard braking? Why would they warp so easy. What do i do now? You cant re surface slotted rotors from what i've read, so do i have to throw them out and spend hundreds on new rotors?