requires N gauge wheel axles

MakerBot

MakerBot Replicator 2

Doesn't Matter

No

0.1mm

100%

ABS used. Not tried anything else.
CTC clone of a dual makerbot.
Use wire to hinge couplings. I used electronic component axial wires.
Carefully cut out side panels for open wagon with sharp knife and needle file..
Glue basket onto chassis
Fit N gauge wheels.
Wrap and glue iron wire around coupling stalk for magnetic decoupling
Can now afford a whole fleet of wagons :)
Picture of example could be cleaned up better. Just a proof of concept.