I just shifted the entire battery/servo tray in my 2.6m Fiberclassics Extra BACK 15". .from the wing spar area to the back of the cockpit. . and the plane is STILL about 3 ounces too light on the tailpost. That's a weight shift of about 26-28 ounces a distance of 15" .. nothing in front of the wing spars except for the engine, canisters, aluminum spinner and CF prop and the 32 ounce gas tank is on the belly right beneath CG. Kind of takes that theory of BME engines being "too light" and shoots it right between the eyes, since I can't move anything farther aft.

Guess I'll have to install that CF spinner now, take a few ounces off the nose.