scalemaster90 Here Is How I Do It.Using 2 Servos
1) The Trailing Edge Is To Thin And Has To Be Cut Back To Fit The Aileron( Either Buy The Balsa Pre Cut Or Make It.)Make Them No Wider Then 3/4" MAX U Don't Want Them To Sensitive)Leave Enough Trailing Edge For Strength.Take As Little U Can.1/4" 5/16"Max
2) Find The Middle Ribs And Sheet Them With 1/16" Lite Plywood,Add Fillets.
3) Epoxy Plywood Servo Mounts Across Ribs.Sinking Them So The Servo Horn Will Be About An 1/4"Above The Surface.Make Sure The Servo Will Come Out Before U Set The Plywood Cross Pisces(Guess How I Know)
4) Make Holes In Ribs And Fuse,For Wires.
5)Test Mount Servo.Remember 1 Pulls Off The Left And The Other Side Pulls Off The Right.Adjust Height.
6)Cover Wing And Aileron,Cut And Install Hinges.3 Or 4 Should Be Fine.Space About 6" Apart.
7) Install Horns,Push Rods.
8) Continue The Build,Good Luck
The Servos I Have Used ,3004,HSMG 645, Any Servo That Gives At Least 44 Oz.To Save Weight U Can Use A Micro Servo For The Throttle.
If Height Is A Problem Hitch Makes A Thin Servo.A Hs77 I Think.

Any Other Suggestions ??