Now, if I was to do it, I would use (2) servo's located at your blue dots. Cut a square out, glue servo in, run wires along slot to center section, use "Y" cable to hook up both servo's to ali channel on Rx.
"Y" harness
http://www.hobbypartz.com/79p-10100.html
Servo's
http://www.hobbypartz.com/33p-solarservo-a106.html
Better
http://www.hobbypartz.com/9gexidimeges.html
Horns
http://www.hobbypartz.com/coho133ho2pc.html
Pictures
http://www.google.com/imgres?start=1...&tx=102&ty=115
http://www.google.com/imgres?start=1...6&tx=121&ty=91
http://www.google.com/imgres?start=1...34&tx=53&ty=98
Now, do you have any one who flies near you? They will be a lot more help to your success then I could ever be.
Buzz.