The rewind thingy is a cool new cast, thanks for sharing.
Since I did not know of its existence, my choice in the described situation has been a single spey with a really flat backstroke and a radical change in direction (say 90 degrees). Keep that V-loop tight and fast. And a flat forward stroke as well, as mentioned in the OP, with rod tip dropped to water immediately after the stop.
Like an unconscious answer to a question that has been troubling me for long, or a sudden opportunity to achieve something valuable I had almost given up on, the fish is there.