This is what I would do since it is already built. Cut the flaps free from the alieron, glue a piece of balsa to the top bevel of the flap and leave the bevel on the bottom. Get a "Y" harness for two micro servos and use the two micro's, one for each flap. Put the flap servos on a mount and run the push rod through the bottom sheeting and to a control horn on the flap. For servos I would use Hitec HS-81's, they are strong and lite.


Dru.