we had the patrick edge and it flew like a bat out of ---- on a brison 2.4!!!! reliable and strong! the 40-50cc gassers are great for these planes. the extra is the same size as the edge we had and would be the same i'm sure. as far as servos go.. the faster the better. i believe we had 5645's in ours and they are a bit slow. the torque is there but the speed is terrible. i would recommend 5925's on the ailerons and the elevator and a 5955 on the rudder...
good luck and
