Good flying plane. I had one for years to fly in larger engines and mine had several on it. I liked the .91's best. The .61s were low on power and the 1.08s were too heavy.

You really do need 2 aileron servos. Mine had 4 servos in the wings with flaps and an Ultra Stick set-up program in my 8103 for crow.

It also needs 3 degrees ( about 2-2 1/2 inches)anhedral on each side to be able to fly knife edge without rolling out. I am attaching some photos. The one with it inverted in a cradle shows that it looks like a low wing plane with dihedral when it is upside down. I have flown all three, stock dihedral, flat wing and anhedral.

Stock dihedral-it's just a big old trainer type plane, poor outside tracking (wants to roll out of outside loops/maneuvers), rolls out in knife edge and in long turns.

Flat wing-flies better, but still rolls out in knife edge. Better outside tracking.

Anhedral-flies like a low wing plane. Good outside tracking, holds knife edge without aileron. Holds bank. Seems to land a little slower, but this may be the false perception that it is packing air under the wing for better ground effect.