ORIGINAL: snacker
Balances out fine. I added no weight and it was right on CG. I built it stock per instructions, no mods. JR 126mg servos, ar7000 reciever, 6V battery and Saito 180 GK.
You will have to sand down the inside cheek for the throttle arm and reverse it 180 degrees. Engine was made for this plane IMO.
Enjoy,
Snacker
Snacker would know about the mounting of the 180.