The servo is mounted upside down so it clears the rear wheel and the servo arm lines up with the fairings one each side.

Bottom left shows the box before it's glued in place, note the slot for the servo mount. also you can see the linkage that will rotate the rudder.

Bottom right you can see the servo in place. It is held in with a piece of plywood with a slot like the front of the box and two allen head screws so you can remove it if it goes bad.

The assembly is set forward so the rudder post can recess in the fin. And you can see how the servo arm lines up with the fairings.

The rudder is mounted with typical wire and nylon mounts that are mounted to a plywood rudder post that's epoxyed to the fin.

The push rod is a piece of carbon tube with 4/40 all thread epoxyed into each end of the tube. The bottom 4/40 clevis is soldered to the all thread so it won't turn. The servo arm is a heavy duty type from "Dubro" I believe in strong, positive connections when it comes to elevator linkage.

Bottom right, the top clevis has a lock nut so you can adjust if for the correct length. I made a elevator horn out of some flat aluminum that is fit to the profile of the elevator and is inserted into the skin so it is locked into position as well as epoxyed.