The Feathercraft Rudder
The Feathercraft rudder design was the first to lift the fin to rest on the stern deck. The rest, as they say, is history. Most followed with this idea and design.
What may look similar, does not make it the SAME. Feathercraft parts are not interchangeable with other manufacturers’ design. Mounting pins (pintle) are different in length, style, and diameter. The block which holds the pintle is a different size. Pulleys which raise and lower the fin are also not compatible.
In a time long ago, kayak models by Aquaterra/Perception and Prijon used a Feathercraft style rudder. Parts for those are no longer available – and the modern parts are not compatible.