I have built a couple of these kits just for fun. I would suggest using two aileron servos and do away with the complicated pushrods. Split the elevators and use seperate pushrods. I clipped the wings on my last one and used an OS .40 4 stroke. If you use a 4s you will need to shorten the nose a bit to compensate for the lenght of the 4 stroke. Remember the wing struts are functional and will need to be used or you will fold the wings. Lots of build threads on this plane.

JEB