Na, no idea on the calliper temps. The fluid was fresh, because I put the HEL lines on last week and flushed 1.5 litres through it afterwards to make sure all the old stuff was out.
I have some footage of the day, but unfortunately I'm away working and cannot upload/download or watch any videos. But I wouldn't say I was gentle but nor was I overly aggressive on the brakes. I felt the ABS a couple of times. I would say if ABS intervention was 100% braking, I was generally braking at 85-95%.
It was my first 'track day' in the zed so wasn't going like a nutter (although nothing overtook me all day, including an Aston V8 Vantage, Porker Carrera 4, a BMW M something, lotus Elan and a couple of Elises, vx220s, a caterham and a couple of modded TT Quatros.
Yeah, I was very happy with my brake set up. Which is more than I can say for my oil temps!!! (oil cooler now next on the list)