The complexity to build a V-REX will combine the knowledge of aero- und hydrodynamics. Specially the aerodynamics is a big part you instantly recognize if you look at the boat design.
So, it is more to build an aeroplane with some hydrodynamic parts.
But also considering load cases once V-REX has a “touch down” whilst sailing with high speed. Avoiding structural designs which becomes too heavy and concentrating on the aerodynamic stabilization system.
The more we are into the building process the more we understand what is the V-REX capable. One thing is definitive right now:
V-REX will be the very first sailing vessel of a new generation how to sail.