What's the story with kite-reeling?

You can see Ampyx are putting in a power of work to really get detail on the system parameters which will make or break kite reeling.
The tether testing they are doing here is essential.

I really wish we could see the Ampyx presentation on the robustness of their software and design methodology from AWEC2019… Definitiely one of the best presentations there… but still not uploaded.