The goal is get both the rudder post and the thrust line of the engine on the centerline with the horizontal stablizer saddle at zero to match the wing tube.
This is the first time I used this method, on previous builds I just squared the wing tube to the rudder post. This worked well and will use the same method in the future. With this method you aligning both engine and the rudder post while the previous methods I employeed only aligned the rudder port to the wing post.