" aerodynamic analysis of the WW hull". What looks streamlined to the eye is not necessarily that to the air. Air behaves in mysterious ways at times. And the after sale/build position of a paddle board, solar pannel, ... can change the characteristics sometimes drastically, rarely to the better. I have also learned to appreciate the role of windage when mooring and when moored. There was some discussion on this topic re the Melbourne proa. Would slanting the windows help that much in that boat?