Part files based on Airfix H0/00 kit loaned by Trevor Boulton.
Additional detail from RCH wagon part drawings.
Parts designed to be printed flat on filament printer bed. Support will be required under some overhangs. Assembly intended by adhesive or solvent weld.
Some parts e.g. buffer guides will need 0.2mm dia extruder nozzle. 
At time of loading I have only printed wheels and wagon ends. Print as you fancy and let me know of any changes needed. Peter J.