Thanks for the feedback so far. Cooling seems pretty good and I've never had brake fad/problems. Pads are Carbotech XP10's which are not very aggressive. I have spare rotors AND rings already mounted so a rotor swap at the track would be easy. As for "hard on brakes", how do you define that? VIR has 2 straights where I hit about 136 mph and both end in 45 mph turns. We are there 3 times per year each for 3 day events. Another track we visit twice has a single straight very similar so ALOT of hard braking zones.....however both of these are long enough that cooling seems to be sufficient.