I just won also with CCR_BR2 tune, well sort of, i added a ballast so i adjusted the springs a little.
my settings are like this
aero. 0/20
Weisght reduction 2
Ballast 101kg position 50 then power limited
tranny geared to 106mph
STANDARD flywheel, its better for hills
lsd 8/37/35
R-height -20/ -20
springs 7.0/5.0
extension 5/4
compression 4/3
ARB 3/3
camber 1.6/1.2
toe 0.20/ 0.10
I think giving the car closer to 50/50 weight distribution helps a lot, with it this way you can take the hard left hander after the long straight at just above 60