Well the 96 had rotors that could come off as easy as the new car so im guessing you either had them cut on the car or just didn't cut them. Sad to say the best way to cut rotors is on the car. Unfortunately you have know idea what condition the guy that cut the rotors machine is in. It could have a bent shaft and or you don't know what experiance he has either. I think the best way to fix this is just buy new rotors. or have them cut on the car.