I have a Corse S with a Tilton pedal box. The calipers are some really dated looking Fiat part with a single piston on one side. They don't seem to be particularly powerful and I'd like to upgrade. Has anyone got any ideas for a kit etc (Willwood/HySpec etc?) Bigger vented discs would be a start, then perhaps four pot calipers? I'll be changing from a Volumex to a 24V at some point, so it's worth doing now. Any ideas welcome.