I had the hub machined down (looks nicer and keeps the wheel in the original position) and had to have the steering wheels redrilled to the NRG pattern. Here's a link to the thread with my pics (10th post):
Sparco quick release steering hub
Upside= Can switch out the wood and the leather wheels.
Downside= Have to remove the wheel every time I park, so nobody takes it.
Probably would elect not to do again.