He helped me out with my wheel fitment issues. Now I clear but about 1mm or less. Just barely enough to squeeze a medium/small zip tie inbetween the wheel and caliper. My clearance issues with with the nissan logo. 3mm spacer fixed it. 3mm is such a small spacer that the wheel still rides on the hub, thus hubcentric is not necessary and neither are longer wheel studs.
FYI my setup is with the 3000gt rotors and the d5r's wheels that luke did the group buy for. The 3mm spacer was like 20 bucks and it's a hell of a lot easier and cheaper than swapping calipers.