So how many times did you pit to let your brakes cool down within the 60 laps that you did?
each lap was a bout 60seconds long to 1min 10s ... I did about 4-5 laps and then ran 1-2 cool down laps with very little braking... the brakes started to fade after the 1st real lap (after warmup lap) and never performed well really but worse as it progressed. I'll stick up a clip on a 'normal' lap that I did.
You have really answered youir own question here.
Even with a proven set up you require warm up, cool down and some pit time out.
You say 60 laps in a 1 hr track session, I would be looking at 3 sessions of say 10 laps and 3 x 10 min. pit stops between each track session.
My numerous pms to you, explains fully my thoughts on how to improve your brake set up and how to get quality and enjoyable track time.
Have a read at the post put up by Maz0, he has the right idea.
Alex.