Rubber Band Powered Car Collection III (additional)

This is the final model of Rubber Band Powered Car Collection III. http://www.thingiverse.com/thing:430823
United Kingdom---Morris Mini ?
and the result of shrink printing of VOLVO.stl http://www.thingiverse.com/thing:413368
[Nozzle = 0.25mm] and [Z-pitch = 0.2mm]
75%---It's working well with 2 rubber bands.
50%---Not working (joint together it's inner parts with my printer)