Rudder setup

I just purchased a Swordfish and need to attach the rudder. Question is, there are two washers, does one go below the ski between the rudder and the hull and the other below the plate the rudder cables are attached to and the hull? Also how tight should the nut be that holds the rudder shaft? Should the rudder peddles come back to center when you lift off toe pressure, mine stays where it's at?

Thanks

The rudder shaft should go into the bottom of the hull with no washers, this to limit the chance of getting weed in the space between the rudder and the hull. If you are a perfectionist, you can sand away the small bits of excess material around the shaft to get a precise fit. Use the washers at the top to fill any space between the top of the rudder sleeve and the rudder plate, such that there is no play when the nut is tight. The nut should be tight enough to draw the rudder plate onto the square portion of the rudder shaft. It is a lock-tight nut so does not need to be over tightened.
The shock cord on the cables is only there to keep the cables taught, not to straighten the rudder.
Hope this helps.

Thank you