NB Brake dimensions (to swap onto ND)
 

First off I know and it's fine.

Secondly, does anyone have drawings or know the NB brake system well enough to tell me what all they got going on for rotor offset from the hat and dimensions on the caliper brackets and calipers them selves (piston size etc) without me going to a parts store and buying then returning everything?

Long story short I've got a ton of 15" rpf1's laying around with takeoffs from an endurance car. I want to have the ability to run gravel tires and ice racing tires with bolts in them too. Wide wheels fit over the stock brakes sometimes but narrower wheels (<8in) for ice racing and gravel tires don't. The off the shelf 4pot powerlites flyin miata sells are marginal and probably nogo without a 5mm spacer or more on a 15x7 rpf1, Goodwins kit which I like as far as components (steel inserts in the aluminum vs just aluminum brackets, more expensive bigger calipers) are going to be even worse on fitment and even with a smaller rotor wouldn't fit. Flyin miata kits are also... expensive (1200 for like 4-500 bucks of calipers). I know when I had my NB the rpf1's cleared and i'm thinking if the piston size and rotor is similar to the ND they could get swapped over with a new bracket. Other thought I had was find eurospec rotors (1/2 inch smaller i think) and shave down the flyin miata brackets (is there enough room?) and add a second caliper to the rear for a hand brake? (both goodwin and flyin miata kits make the handbrake useless)

Any other thoughts on how to fit narrow 15" wheels without totally f'ing the scrub radius are welcome.