30 Nov. Added simple "split body" parts. So they can be printed flat.
They have no attachment features, but I expect you can easily use some square sections in the corners!. I have added both "squared off" ends and ends with the arches, in case you would prefer to make the roof from some curved sheet instead of printing it.
This is a Fr wagon, using the basic bogies, buffers bars and wheel fittings from my 12 ton wagon.
It ws done as an exercise in using F360, tracing from an image.
I have not printed this yet, so there may be tolerance issues. The intention is that the axle parts should fit the slots in the frame, and that small (1.8mm) screws then hold the body down through the frame.
The rotating bogies are designed to take 3x3x7 ball races.
I think the main door is open, but I may not have the "hole" in the correct place.