I’m sure you provided a great picture. Running around in 5mm suits, sweating and trying to foil…
The guy in the video runs horue, so he’s a very experienced foiler.
A luggage scale might do the trick. When you get up you know the thrust needed with a sup foil, we then need to add thrust to overcome the drag of motor, propeller and duct.
Thinking about it, it’s probably not only a matter of thrust but also speed. Maybe you couldn’t run fast enough in your wetsuits.