Aluminum Rudder
If you're looking for some more low-speed maneuverability or improved high-speed tracking then here's your answer Berkeley manufactures two models of bolt-on rudders The first is an entry level economy plastic rudder, while the second is a sturdy cast aluminum version of the same rudder Note: The plastic unit will not survive in aggressive boating situations If you want durability then you need an aluminum rudder Rudders sold complete with pin and hardware.
Plastic Rudder