Anyone have the specs on the rotor thickness on a '88 Reynard FC? Have Lightened (holes in the hat) and grooved rotors front & rear, LD20 in the front, LD19 rear. Currently the rears look a bit thin @ .250/270", front look fine at .325". Pegasus indicates about .290" as their new rotor thickness. The groves on the .250" rotor are close to disappearing...