On my Tensor I put two aileron servos.
Yes, the stock hardware will work on 2 servos.
Sorry I dont have any pics. I just got rid of my tensor---Too fragile[&o] But I will try to explain.

If you look at the instructions you need to offset the servo-because of the fuse.
With the servo already offset all you need to do is put another servo on the other side of the fuse---Right next to it.
Set up your linkages just like you would with one servo-Just cut off the side of the servo arm you are not using.

This is stronger, and you do get better throws-but after a while it seemed like I was sacrificing performance with the extra weight-
Just a thought
I really dont think that you need the extra servo.