supermoose - I will not be attending any detroit-scca events this year - look for me at SBR-SCCA, WMR-SCCA and aroc events mostly, some CCM events and the MSCC time trials at waterford
Evegan - I run those tires only at dry racing events - i run my 215's on 17" wheels daily, and at wet events, and they fit without the spacers. the spacers just fit between the wheel and hub. I will try to take a picture of them tonight.
it is VERY important when running spacers to torque your lug nuts properly, as the lessened contact area between the nuts and studs weakens their "grip" I feel the 3mm spacer leaves just enough thread to hold securely, but again one must be careful. anything wider (i was contemplating 5mm for that little extra space) and longer studs would be highly reccomended.