It needs not a modified body mold, as if it's done a particular way you can stuff the 4wd under the body, using "tensioners" to redirect the belts(if belt driven as I would suspect) under the standard bodywork to maintain as close to the real thing look as posable. Would not look scale if there is a noticeable body shape difference between the r18 ultra and the etron r18 models.
I would call the slot it audi with the pulleys and rubber band experimental or a prototype to test. Notice that the wheels and tires on the pulley side are both projecting beyond the bodywork. I have seen the photo without the blurred segments and they are slot it pulleys. Slot it has made the pulleys for a long time for the four wheel drive cars. However as far as I know, they do not make the rubber bands (or drive rings or drive o-rings or something). I do not think Slot It would release a car with the wheel projecting outside the bodywork.
The newest slot it gear tool looks very promising. It can pull and push a pinion on a slot it car with the anglewinder motor mounted.
I think AutoArt did this on some Lambo models, by using an inline motor, with a long shaft that drove a crown at the front (via a drive shaft) and standard rear drive. May be simpler than a "belt drive".
But in slot cars, I don't see how it can be an advantage. These beasts are probably fastest, if in a "tripod" config, where the guide serves as the front end, and the front wheels barely (if at all) touch the track. Nothing I like however, as I like to see the front wheel turn, like on a REAL car ...
Maybe "slower",but prototypical.
Maybe just a "research" project. But all it may show, is just how differerent the laws of physics affect our slot cars, as opposed to the real thing ...
Last edited by ModelTrainGuy; 10-07-2012 at 02:50 PM.