Replace both springs to get even pull on the cables.
Tie strings on each of the rudder cables at the tail cone, and pull the rudder to one side and disconnect one cable, then push to the other side and disconnect the other as Carl says, and you may also need to disconnect the steering rods from the steering collar, this will allow the rudder bars to flop free, hook up the cables and verify the springs are still properly hooked, then reconnect the steering rods. Easy job except for standing on your head under the panel.
Charles
