You might have seen it but have a look at the Atom video on Flexi..Backward rolls with a Hydrofoil.
https://www.flexifoil.com/products/kites_range.php?rid=125
so thats how its done Shem............better luck next time.
Ye, now that I can use my ankles again, Ill be giving it another try, hehe. Had a quick go on Saturday, and using less power makes a lot of sense the only prob I had was water depth, so its a no go for those straight on shore days.