Trailer for my litle Quad (also valid for cars)

I made this trailer used to tow a lipo and brain that controls the crossing lights, brake lights, and start / stop the engine.
It can also be used for car or truck with some modifications.
The wheels are miss with this mold:
http://www.thingiverse.com/thing:1136733
the trailer is inspired by this thing:
http://www.thingiverse.com/thing:1099039
and the container box was taken from this one:
http://www.thingiverse.com/thing:43910

PLEASE! do not use this or any other mine contribution to