this is a small classic class J69 steam locomotive, who traveled to England, Scotland, Ireland.here is a photo of a real train, which I took as a basis. This steam locomotive consists of 36 parts, (BUT I DIDN'T INSERT THE SAME ones so just print 6 wheels instead of 1pc) and other same parts too. The length of the locomotive is about 100mm (this is the H0 scale), but you can scale the file without any problem. Wall thickness from 0.5mm to 1mm. The locomotive can be rolled on rails if you do not use glue for the axles of the wheel axles. This model is easy to assemble, tenon-groove method. If you can not contact me. Enjoy!