Yep I realize that road registration may be non-trivial. I'm in Texas, and I've been horrified by what the Ariel Atom guys have been going through:
http://www.arielatomchat.com/forums/thread2198.html
Now with the 7 family (even locosts?), I *think* the situation is better, because it can be registered as a historical replica, of a once road car. I'm not yet at a point where I can have a pure track toy - so any vehicle I own has to be able to be driven on the street.
Hmm, haven't been to MSR in a while...