Just finished building one. It too was extremely nose heavy. I moved the Tower Hobbies 75 back 1" and moved both the elevator and rudder servos back to just in front of the tail feathers. The plane now balances with the 5 cell battery under the servo tray and the rx located just aft of the servo tray. This modification also required an additional servo for the nose wheel steering with a Y harness connected to the rudder port on the receiver.