[James Leeder]

I agree with Don, having the race go from 3am to 3pm means the track temperature might rise from 10C to 35C in the course of one race, and in ACC it's impossible to set up one set of tires to handle those conditions. You'll probably lose 20-25 seconds over a race, and be struggling with the car for most of it, but a tire change still takes 30 seconds and isn't worth doing in the long run. I think either a 6X 3am to 9am race would be perfect, since we would still get a nice sunrise, and the temps would only rise about 10 degrees or less in that time, or a mandatory tire change that allows us to adjust tire pressures for midday temps without losing time to those who didn't change.