I use a bit of serran wrap on my XXXT for the snow (all the way around the chassis), of course my fans all blow front to back so the small area around the steering links and the gap at the back let air in and out. My Academy SBV2 Pro has a body and udercarage cover that work just like the serran wrap so it's good to go all the time. I have found that I can put MGT tires (wrong side out) on the Academy and the hub screws hold them on plenty well enough for the snow. :)
Some day as cash provides I think I'll get some paddles for the XXXT and make some ski's for the front end.
If I could only draw what I see in my head, then afford to build it, and finaly get to play with it...