As an American, wheels are far better than legs. So here is my attempt to enhance the Cupcake transformer with this set of 6 wheels. I've borrowed the stl for the leg to make it all work together.

The other reason for creating this mod is to try out my designs for a printable axle. After some trial and error, this is first version that works pretty well

IMPORTANT! I've devised what should be a printable axle. This will not work if there are too many strings. Turning on "comb" fixes this. Also, this model also works best if it is mostly printed at low temps in order to print the modest overhangs. I print the first layer on the HBP at 220C and all other layers at 185C (my thermistor uses the suggested settings which may be off).

I did see some error in skeinforge, but everything printed correctly so knock on wood.