when you say "adr's can jam it" i hope you have a good legal defence for when you have to explane why your car didn't stop and mowed down a a group of pedestrians. That aside willwoods are mostly made for competition vehicles , there are dot approved models but the dynalite version you mention are not adr approved because they dont have dust seals on the pistons . Also they are very flexable in there construction so get used to a spongy pedal , some of the early models had round o'rings as seals another no no for reliable brakes . have you concidered the 4 piston sumotomo calipers that are standard on the r32/r34 skylines they would be plenty good enough for a 1200 and are traceable back to a adr approved car , these can be fitted to 15's no problem and i'm sure to smaller wheels if you can reduce the disc diameter accordinly , all things concidered if you kill someone and you cant cover your ass "you " are responsible . sorry to put a downer on the topic but in the long run it's just not worth it.