Interesting! Following up the
Aeromod Loadstar Model 100 led to the Miller Bipe C which sorta looks similar, but with Pitts-style struts and different back windows. Hmmmm...
While you are all mulling that over, here's another "what is it?"; quite by chance I happened on this image I thought lost for all time on an old memory card just now. I took it at Paul Nalson's aircraft scrapyard by the North Downs Way nearly 20 years ago. Somebody on PPRuNe had seen it and asked if anybody knew what it was, so I trudged up for a squizz on an October Saturday afternoon and took the pic. Again, I've no idea and I don't think we found the solution back then. Anybody?