I am having the same problem with my Funtastic 3D by Protech. At 116mm back from leading edge of wing, it is incredibly nose heavy and i have already shifted the battery pack for the Rx as far back as possible. My fuel tank is empty etc., but it would require a chunk of steel @ 3/4" x 1.5" x 3" placed under the canopy to the back and it was still heavy in the front. there is nothing that a person can move as far as components go and with this plane there is really not any place to add any weight on to the rear of the plane the way it is made.