I see it just now, after 4 years xD
Constructive critisism: the gears will hold together the 1-wide chain link as roadwheels, but they put more pressure on the links (both sizes) than regular wheels and more friction. This will decrease handling, increase stress on the linking elements and increase the chance of throwing the tracks..
Furthermore, I doubt the effectiveness of the 1-wide chain link with such a small design (when the 3-wide is applied as well)
Third: depending on your usage of it, suspension could improve handling, but not with gears as roadwheels.
It is very compact and i think the ratio between the length and width of the tracks combined with the total dimensions is pretty neat