Centre the servo using your TX, and fit a servo arm. Use either an aftermarket arm or attach the arms that were supplied to a servo head. Screw ball
joints onto the pushrod (use pliers to hold pushrod) and bolt in place with supplied bolts. Centre of servo should align with elevator flat to the stab.
If you are using dual elevator servos then repeat the process on the other side.
Rudder
Remove the covering where the rudder horns push through with either a knife or soldering iron.
Test fit the rudder horns
Sand the area on the horn that fits inside the rudder so the glue bonds better
Glue the rudder hinges into both the rudder and fin using epoxy glue. Remember to use vaseline on the hinge joint. While drying use tape to keep it
in alignment.
Glue the rudder horns through the rudder with epoxy, wipe off excess glue while it is wet. Use the ball joint and bolt while gluing to maintain
alignment. While still movable measure that the same amount pushes out each side. Care needs to be taken here otherwise your rudder geometry