A flatcar, with integral stakes (4 feet long) that can be trimmed or removed as required.
There are supports for a handbrake wheel and shaft (not supplied) at one end that need to be drilled out.
Based on the rolling stock of the Ohio River & Western Railway.
This model is designed for HOn3 couplers (Kadee 714).These will have to be glued in place as the floor is only 1mm thick (unless you have a better idea).
Instructions .
Now with separate brake parts (air and vacuum), to be found attached to the bolsters. Remove these and use whichever is appropriate .
With added protection for the stakes.
Shapeways can no longer print this without it breaking.