Is that Gemini the 3rd or 4th attempt of what was (is) also known as
Diesel Air Ltd., Laukötter, Golle or whatever company which presented this engine on the Aero 2001 ?
Since
Junkers sucessfully applied this System in the 1030s and built several thousands of them for long range seaplanes it is a little bit like nessie... From time to time somebody surfaces with yet another version of this engine.