This is my third attempt at a 'Tiny Tracks' RC Vehicle (small enough to fit in your hand). This uses 52 printed track segments connected using small bits of 1.75 PLA.

2 of the wheel hubs push directly on to the shafts of 2 N20 metal geared motors while the other 2 wheel hubs are part of the chassis with 'print-in-place' axles.

The insert for the bulldog is printed in contrasting colour and carefully hammered into the recess on the roof.