Sometimes repeated hard braking without a straight to cool them is just as hard on the brakes. You're better off running those PFC's for safety sake. All things I've seen is that PFC 01/06 pads are very gentle to rotors. You might find that the first part of the day is spent getting up to speed on the track...then when you start cooking, you'll start cooking pads. At a minimum, I'd bring them to change at lunch time or just in case.