I placed one on mine using the mount that came with the plane. You have to mount it at the very end though. I placed my battery pack and reciever right behind the throttle servo. No extra weight was added. I use 3004 servos all around except for the rudder. I used a hitec 605bb here. I did pull out the firewall though on a very ruff landing. I ended up replacing the firewall and mounting the Saito right side up. I did't like the fact that the carb was below fuel line and the fuel drained into my motor. It may look ugly, but it flies and FLIES GOOD! I seen the video with the 91fx on it. Looked good. I gota say, with a apc 15x4w prop on the saito, I can take off in 5 to 10 feet and pull back and go straight up with no end!