Jim,
everyone can watch the videos of my built models on youtube under "charly05ize". Among others the Callahan inspired engine after Doug Kelley & other American (Galloway 5 HP) & German engines (e.g. "Daimler - Maybach" test engine 1883) & a "Dürkopp" trunk piston engine. There is also an atmospheric gas engine from "Otto & Langen 1867", to name just a few. There are also Stirling engines, flame eaters and steam engines to see. So there is something for everyone who wants it.
Greetings Karl
Post them up here Karl and start some threads and then we have the benefit of being able to talk about, enjoy and discuss your builds.