I've had some difficulties with the Twist-n-Stow rudder on my Revo. One of the issues was during a back troll while halibut fishing. One of the rudder control cables "jumped the track" and became inoperable.
Back at home investigation through the rear hatch revealed that a pad-eye attached by one end to a hatch screw was the method the assemblers used to guide the rudder control cables. When the cable jumped out of the half-attached pad-eye, the slack introduced rendered the rudder in-op. I don't know whether this is the standard Hobie rudder cable guide, but I suggest replacing these things as shown below.
Here is a photo of the pad-eye from the inside, and a photo of my replacement solution.
