1 fin, 2 fins, 3 fins. Boards are capable of letting you slot up to 5 fins now all at one time. I really would LOVE to share my futuristic fin idea on here with you, but then I’d have to kill you…. it’s Tesla Surfing level stuff, its that cool! AND I am pretty certain (if it’s not already in the works) it will eventually happen. Do I have any venture capitalists readers on here that wanna talk???? I’m actually really serious about it and it is totally doable and would change the fin game pretty much if you can imagine like how Simon Anderson did with his thruster setup. GAME CHANGER!!!