I need to work on the brakes of my 99 4x4. I have 83000 miles and have changed pads 3 times. I was told that the proper way to have the rotors turned is on the truck, problem is I can't find anybody in the area that can do it that way. If the rotors are taken off the truck and made true, what would be the difference between doing that and just getting a new set of rotors. Also do the rotors just come off over the lug nut studs. I bought a Haynes book and it is not covered. Need Much Help! R. T. B.