I can measure your wing effectiveness. I have prof. a device for measuring hydrodynamic parameters of a wing, propeller, etc. But I must first make a metal frame so that I can fasten the wing and immerse it here: https://efoil.builders/uploads/default/optimized/2X/6/64e8564692b32bdcbf7ea1f134b0fe6c7ebb966a_2_1035x582.jpeg
If the wing has little efficiency, I can upgrade the wing shape in 3D CAD.
Each wing should be as effective as possible so that the start of the e-foil is as short as possible. This will significantly increase the sailing time.