Rubber Band Powered Car Collection

This is a collection of rubber band powered pull-back toy cars.
Each data is provided in a single file.
Sedan ------- VOLVO ?
Off-roader -- HUMMER ?
Vintage ------T-Ford ?
4 to 8 rubber bands (dia. 40mm is the best) are required for each model.
On the wood floor, 4 is better.
Using a paperclip, easy to attach rubber bands.
My printing data is [Nozzle = 0.35mm] and [Z-pitch = 0.3mm]
additional models are here. http://www.thingiverse.com/thing:422548
and http://www.thingiverse.com/thing:430823