I didn't mention Zoche because I'd given up on him. He's been trying to develop that engine for 20 years. His .com website shut down and he quit coming to Oshkosh. I actually like his design very much, but I think he's turned it into a hobby of his instead of being serious.
I'd heard of the Junkers. Zoche mentions them as well.
As you can see. I like the 2-strokes and hope to put one in my homebuilt.