Balance at 5" to 6" behind leading edge no fuel in tank. Also even at less than 3D control throw settings you will need some expotential rate on the elevator and rudder. On low rate my elevator throw is only about an inch up and down 2 inches total and a quick shot of full up at half speed will stop it in mid air. The long fuselage has alot of leverage on the pitch moment(up and down) I would suggest to ask a more experienced pilot to help with the set up of your aircraft. In all this would be the quickest way to enjoying a really fun airplane.Good Luck