Here is what I don't understand. When you slap on a 4th wheel how do you get away with continuing to register as an autocycle? Wouldn't local laws prohibit that? And what about car requirements for bumpers etc? Does that only apply to Polaris or are you subject to those laws once you convert the autocyle to by all definitions a car?
On a different note, I would love to see what the 0 to 60 numbers are with the turbo and 4 wheel kit.
In Minnesota as long as the modification is "bolt-on" then regardless of what you do it can't change the vehicle classification.
Unless tens of thousands of slingshot were to get the swapped(unlikely) or one gets in a bad accident that gets a lot of publicity the laws are unlikely to change, since we are barely a rounding error right now we pretty much have carte blanche.