I have the Hangar 9 AT-6 with a saito 100 in it. The balance point is up against the fuselage against the blue center section in front of the wheel wells. Mine balanced perfectly with the battery located back of the trailing edge of the wing. This is a great flying airplane in the air but very difficult on the ground due to the narrow gear and weak wires in the gear. You will scrape the wing tips on almost every take off and landing especially if there is any crosswind at all. I replaced the stock wire landing gear with the 3/16 robart wire that the make for the top-flite AT-6. What a difference that made. I don't have to worry about scraping the wing tips anymore. The airplane is very solid now on the ground. The wire gear from robart cost $12.00 and took only about and hour to replace.