Since my hotrod is finished, I have bought a metal lathe, and am now researching machining projects. I was able to download free plans from the internet for a simple steam engine, called a "wobbler". This rather ingenius design has no valve train, but the oscillating action of the cylinder covers and uncovers a steam port as the engine runs. I took the drawings that were supplied, converted them to 3D cad models, and thru the magic of my engineering software I am able to make the engine run, and save it as a video clip.--So ---If ya want to see a wobbler running, click the link (or picture).---Brian