Mad for it also do the brackets.
Ive been told or read somewhere that using the S2 callipers with brackets and 2wd discs gives more breaking force than using the 4x4 calliper and 2wd disc, dont know how much truth is in it though
Ive got 4x4 calliper and 2wd disc setup on my S2 with Ferodo pads and it works a treat