I built my steam engine without a kit, just looked at a diagramof how these worked and then went to home depot, got a square tube for the part that changes where the steam goes(that was hard cause I had to get a peice that went inside of it that fits weird) and then I had to drill a ton of holes from the steam engine arm to the thing that changes the way that steam goes (top of cylinder bottom) sorry about the vocab, really didnt study it or anything, it just was a fun project) but the hardest part was finding a good cylinder for the steam, I cant get a picture now cause I am in maine and the engine is down in florida. It is at my grandparents house. they have all of the tools. I will email them to get a picture. This project is really fun to do. I am thinking of making a larger one to put in a big boat(13 feet or so) an put it in a pond and go drive around in it. maybe in a couple of months. later