But, Silver Sable ! There are not alot of mechanics that always do things right. Yes you can warp your rotors, after i had that incident @ w.mart i checked both rotors for trueness, and they were not even close !! replaced my rotors and no more vibration,,,,, it never even had a vibration in it when i took it there, afterwards it did. So if my new rotors took out the vibration,,,,,,, and you say you have never heard of rotors warping,,, what was it ?