It‘s an After7 which is the custom-built version of the Alpha7, built by Daniel Fenn. It has the Panzerlenkung and is super lightweight.
Interestingly since Hajo sold his DF velomobile he seems to use his Milan SL more often. I am not sure how well he has bonded with the After7, but he can certainly ride it fast!
Not sure about the tailwind but it doesn’t help much at all in a velomobile anyway.
He rode it last time with an average of 52 and that was in a DF I think.