If anyone became interested, I can warn you that the supply chain for large one string kites is broken. Mostly out of stock or overpriced incl shipping. After much drama I was able order a parafoil in the (over) powered range of the second video. That is about 25 sq ft (per kayak), while it is more common to suggest the harder to find 8 to 14 range.
I am not using my steerable kites due to their power spikes. There was a how-to writeup sayng 45 degrees off the wind was feasible with a rudder, and mirage fins should only be a help. I was tempted by a ground skimming ring parachute, but worry it might sink?
