I glassed fin box myself, because I invested between 150 and 200 hours of work in the SUP production, which also includes inlays.
https://s8.mojalbum.com/17404588_18130818_23785220/sup-ribolov/fishing-sup-kaholo-14.jpg
I don’t have any material inside SUP that I could build fin boxes into. I already have Pixhawk 4 programmed with skid steering.
It may turn out that the angle of 5 degrees of the T200 facing inwards is too small.
Sharp turns are not my priority. I will be happy if the SUP compensates for the waves and wind from the side.
The first tests will be Speed, Tunning Turn Rate, and holding direction in Acro Mode. If Loiter Mode would working, it would allow me to fish at greater depths.
I already prepared some waypoints for real testing in the summer. Making waypoints above the same sea depth (bathymetry mission)