I just got back from the field and I got four more flights in. The plane is nose heavy even though I balanced it and it was between 3.25 and 3.5 inches back. In inverted flight the plane dives at about a 60 degree down angle hands off elevator, and requires between 1/4 to 1/2 elevator input to keep it level. With the large Saito 125 I can't really afford to add weight so it look like Im going to have to more the batter farther back.