Hi !
This year in Berck sur Mer i use this sail...when the wind is not tooooo strong it works perfect.
For stronger wind i have a new idea, a frame with tension lines around, now i can give sails between the lines where i want and which size i want, on the prototyp i use tape, in the future i will make different sails with velcro to fix it on the lines...i dont know if it will work, but i think yes
Gerhard