I have a Hangar Nine 1/3 scale Extra 330L with two 8411's per wing and two on rudder. I used a matchbox on the rudder but I selected four servos and matched the MLP Airwild servo arms that I had to get the geometry correct for the aileron servos. It took some time to get the linkage right. It is possible but a pain. Digitals sure would rob power and kill some battery packs if you let them fight each other!