I believe it's an ~8' ft. long RIS/Sportnautik from Croatia (have had some trouble finding any more specific information than that, at least through site pages I can use Google Translate on). That's really neat about the e-foil site- I'll definitely have to look more into that, I'm sure it could be a really interesting addition if/when I get this up and running! I know trying to put together a corrosion-resistant drivetrain assembly would be a fun challenge.