This is a 1:64 scale (S scale) Steam Engine modeled from an Advance-Rumely. In addition to the 3D Printed parts uploaded, you will need some 1/2" plastic tube for the boiler, thin sheet plastic for the roof and a couple of sizes of plastic rod for the rear axles, steering shaft and flywheel shaft.

Axle holes are cast into the wheel hubs but it's best to drill them out to final size. I used Plastruct .062 and .080 rod. A bit of Plastruct tubing with a suitable ID was used to mount the shaft between the crank end and the flywheel.