I have fixed my problem by, but I'm amazed about all your creations and solutions, great thank you for your reply!
Why do you have a double rudder?
I got sick and tired of trying to control the Yak at slower speeds and whenever there are currents or winds or both present. And straight running without constant input to the rudder was almost impossible. Not enough control authority in the OEM rudder. No way to make the OEM rudder more effective since it has to tuck up in the rear channel. So I put on a large twist and stow sailing rudder. Now it goes dead straight and turns on a dime. No problems with fast currents or winds.
When I first get into the water, I get into water deep enough to put down the rudders. First the Twist and Stow goes down because the OEM up keeps it straight and makes the deployment easier. Then the OEM rudder goes down. When I want to retrieve the rudders, the OEM rudder comes up first, which makes the Twist and Stow go perfectly straight. Then up comes the Twist and Stow.
Hobie PA14 with a mod or twoSome random Modification Pictures