is been while i use fresh set of tire on Caterham, use A050 GS at front 
with barely enought weight on caterham. GS reponse very well under hevey braking, a very confidence move. also try some diffsent seting Tracive semi active suspension. car is a bit unreponse at chicane, but very netural at limit 
over all improve almost 1 sec compare to last winter !!! A great day