Got things squared away with Driverz, Inc
- changed my order to Falken RT-615's, 275/35/18 up front and 295/40/18 rear. Giving up about 0.4" in width to do so (hard to find a 305/40 non-drag radial, apparently), but I suppose these will give me better grip around corners than the NT-555r. Now I just need to finish the car so I can go put-put around the track!