Sorry, don't have any additional info for you but would like to comment on it. This guy is willing to think outside the box.
Just off hand, I see a steering mechanism with linear bearings and a sliding roller. That is a lot more sophisticated than what you see on Can Am trikes and 4 wheelers' in general. It allows more precise control of front suspension geometry akin to an R&P. I had thought about using this a long time ago but thought It might be be over my head fabrication wise, or least too difficult to justify the time.
The rear swing arm is mounted concentric with the drive sprocket which helps with keeping chain tension constant and allows adjusting ride height without affecting it. Just coincidentally, I am working on just such a swing arm now. I am hoping it will also help with ride and jacking problems I had with the old conventional set up.