RE: 4* Sixty question
You might want to pick up a couple longer horns for the aileron in the process. If you set it up so the hinge line to the link attachment is equal to the center of the servo out put shaft to the link attachment, you are it good shape. I did that with both of my 4*60's and now I'm using ball links on the servo arm and Robart ball link horns . The ball link requires a little longer servo arm. for clearance, and if you get a set of Dubro heavy Duty arms to fit your servos, you will be in good shape.
Don