Can you please point us to the site you got this from. I think it's a great concept for light wind sailing.

Looks nice but having so much material cut away from the back of the base of the fin is ... interesting. I remember that one of my criticisms of fins with wings was that the lift generated was too far back, pushing the nose down. The extension solves it. I do wonder how much it ventilates, though, especially in washboard chop.

I love all these ideas ( and tried a few of my own ) , to get the ultimate early planing machine .
Still chasing to get planing as early as possible . So far it's a old RB with the CB removed and slot taped over . But it's a strange planing and lacks excitement.
My theory is , in non planing Conditions you can't beat long and thin .
For early planing I also think long and mid width , not short and wide.
Unless proper foiling , i dont think wings and fin concepts will be the best thing , they may help a little.
I would guess that a no rocker square edged , stretched out Fanatic Blast shape would work good with its parallel top view . It won't like chop or turning , but hey , you can't have everything. It's not like foiling is an easy option , ( although I'm just starting on this idea ) , or raceboards turn anyway. Formula doesn't work for this fat cat.
Its going to be my next project . Could end up with an expensive slug