@Ratcheeroo - I see on your Cherokee that there is no internal frame. I was wondering how you determine the decalage for the wing and the elevator. Do you set it at zero/zero? How do you know where to put the slot for the elevator?
So I made that one from Balsa plans so I am simply following the incidence angles provided, Elevator pushrod will come out the centre back as there is ample room for it and it hides everything basically. Generally speaking most balsa plans will show servo placement, incidence angles, etc. The only time I deviate on servo placement is if the tail servos require long pushrods, hard to get those surfaces back to true centre with longer pushrod runs, and I find with the scale of the planes that I build that it helps CG balance to have those servos further back towards the tail surfaces. I will need to cut a slot for the rudder, basically I just eyeball it LOL.