You need to do a stud ad nut conversion. Also dont use the cheap spacers, You want the expensive hubcentric spacers. When you put them on the hub the spacers give you another 'lip'. I got mine from Burton power. I cant remember what size I bought maybe 16mm? Either way if I know a company that can shave a couple of MM of I would chop off up to 5mm as I sure I needed 9mm to clear my Highspec 4 pots.

http://www.burtonpower.com/wheel-spa...6mm-spt16.html

I see they do 12mm ones now. I bought mine a year ago.

http://www.burtonpower.com/wheel-spa...2mm-spt12.html