Like he said if he wants to spend money on high torque servo's it's his cash.
on the dual aileron servo you will need to make a servo bay middle way up on both ailerons.
I usually just run some hard wood rails beteewn the wing ribs.
I use string and a small nut to thread the servo wires.
I don't know if there are holes in your wing ribs so you may have to cut some.
Good luck