The Performer Single fin features the FCS II toolless LB fin base on a standard Performer thruster fin. This fin allows the user to convert any board with a fin box into a thruster set-up. Available in M, L and XL thruster sizes, the Performer template is regarded as a versatile, all-round fin for all conditions. It can be paired with Performer side fins, or any other side fins to convert a 2 + 1 into a thruster, essentially making the board looser and more responsive. The tooless fin base also allows the fin to be easily moved forward and back in the box to the desired position for optimum performance. This customisable feature can be utilised while the surfer is in the water. No other system can offer this feature! Thruster Fin with toolless FCS II Single Base Converts single box to thruster set-up The Performer Single fin features the FCS II toolless LB fin base on a standard Performer thruster fin. This fin allows the user to convert any board with a fin box into a thruster set up.