John,
The full-size Viggen was designed with a two-part elevon for possible separate elevator and aileron. After initial test flying the two part were bolted together, and Viggen has since flown with one elevon on each side. If you look closely at good pictures, you can see the joint in the elevon.
The canards are used as flaps for takeoff and landing only. They contribute to the STOL properties of the fighter.
The model flies very well if kept light. High AOA approaches look extremely nice if you have the guts to really slow it down. They require a fair amount of thrust.
Orientation is sometime a problem because the fin has the same shape as the wing, and the camouflage does not help either. Do not let it go too far away.
My 1/10th flew very well on a Ramtec with OS .91 and an empty weight of 5.2 kg (11,5 lbs), and the 1/9th is a rocket with the P-120, weight dry is 8,6 kg (19 lbs).
Tjena, Thomas

Per