Nice kite, but the wind is not 5 but 6-8 knots. A very big difference. I have seen a 55 kg woman foiling with a 16m Elf kite in 5-6 knots. 85kg in 5 knots no way. Wind power is proportional to the wind squared. So 5 knots have 30% less power than 6 knots and 50% less than 7 knots.
wow you can tell the difference of 5 and 6 knots from a video . impressive