Printed this when setting up my new printer using .2mm layers. It is not an easy thing to print as the original drawings are for an engine that will be made of cast and machined steel and aluminium, but I got there in the end. In hindsight, it would maybe have been nicer if I had used .1mm layers, but I am quite happy with the result. The drawings are of a Veco .19 RC car engine, so I added a flywheel for completeness. It turns over and the piston goes up and down as it should.