Twinzer Fins

A twinzer is a four-fin setup, but it's not a quad. Two larger fins sit near the tail, and two smaller canard fins mount ahead of them, closer to the rails. The canard's high-pressure side directs water to the main fin's low-pressure side, reducing cavitation and making the main fin more efficient. Jobson claimed canards improve fin power and flow velocity by approximately 20%.

The result is a board that feels like a fast, loose twin but with significantly more hold and drive through turns. Swaylocks riders describe it as "fast speed at trim, arcing, with instant traction on takeoff — the precise, surefooted cutting feeling like you're on ice skates." Manny Caro of Mandala later discovered that Jobson's original fin spacing followed golden ratio proportions — an unplanned mathematical harmony.

Twinzers are a niche setup with a devoted following. The critical distinction from quads: twinzer fins are clustered tightly with a lead/follow relationship between the pairs, while quad fins are spread wider with no such dynamic. One Swaylocks rider warns: a "twinzer" that's just "a standard quad with the small fins forward" performs terribly — the flow dynamics between fins require specific spacing and foiling.