Glass Vehicle Redesign

I've redesigned the glass vehicle, this time using the structure of a go-kart. Like Rich at the meetings said, it might be best to use this go-kart structure for all the other vehicles. I've tried to be as simple as possible in designing it, while still retaining its dynamic shape. If it still looks wrong, let me know and I'll edit it a bit.

Alternatively, I've also redesigned the current design of the glass vehicle in the bottom right corner of the second image to make it look shorter and simpler.