Walt, For the sake of getting your money's worth out of your premo rotors, why not cut them as much as you can without exceeding the mininum thickness. If there is some part untouched by the knife, sand and deglaze and try to blend or match the surface texture so as to avoid slip/grads on application. This may not be ideal but will improve your runout and presurve your 'DeLorean $$" to be spent elsewhere. Lets face it, DeeLorean Dollars are hard to come by every month. Don VIN 6860 [Non-text portions of this message have been removed]