yes, I had seen your evolo before, thanks for that!
It seems more tricky to ride and you can't just get into it with dry clothes and expect them to stay dry (on a cold winter day).
But on the other hand it will be more fun on a warm summer day. They might have slightly different audiences.
I would love to see how the GF09 handles waves, as the ability to smooth out waves is one of the prime reasons to use hydrofoils. In the movies I have seen of the GF09, the water is flat. It's a pity this never developed into a commercial product with several real-incarnations out in the wild where one could find more videos.
If I find more time one day between the other projects I will try to contact the designer of this little gem and find out what happened since those days.