Picked up one of these from Plaza Japan to play with and to maybe replace the scratchbuilt chassis in the WCPR 'Flying Matchbox' at the moment. The 3D print/scratchbuilt one isn't very reliable to say the least.

The Tsugawa wheelbase is a bit long and it'll need a resistor or two as it is meant for 4.5v max.

The design is interesting as the chassis block is produced using a long gear chain that consists of identical gears held in places with pins from each side, and at the end by wheels (also split axles). The axles and pins fit into the same exact gear moulding.

This of course means that you can swap them around (I put the end gears back in so I can find them if I ever want to swap it back)

Turns out the screws foul the wheels but you can drill new 1mm holes and tap the screws into those instead.

All fits below the windowline and I think with care I can get the decoder and resistors hidden too. I'll pass on sound for the moment.