Good ideas all , I've considered the D2...not quite what I'mooking for, I would like a miniature Creters looking engine, I went in my mind all the Jensen variations and a #35 seems like I "may" be able to make compact enough. Still looking for the right engine. I really prefer a slide valve horizontal engine.I think Nick bought a miniature Stuart from George Brittnel that would do nicely 😉😄👍