Since both myself and 6.forty are super-busy these days, and cant spare much time on this mod, I am handing it over to everyone in the forum to fix/update/tear apart/[censored]/play with.
All the files in this mod are now fully free to use as you wish, its all gone open-source now.
The download below contains a few models in FBX format (3 rigged tracks, and the modular platform set to go with the crawler tracks, the crawler set is all in a single fbx file but is easy to seperate into modular chunks) and their textures, as well as a single unity package containing a scene with some tracks all set up and ready to go. I believe that you'll all figure out whats going on in all this with these files. I am also providing a link to the plugin stuff on Github.
Go nuts with it all, I look forward to seeing what happens with these.