My Giles, with the ZDZ 80, has all batteries (3 total with dual Rx) and ignition secured in or on the engine box, throttle servo right behind the engine box and a single rudder pull-pull in the factory cutout. Even with everything strapped to the engine box, we were not able to acheive the recommended CG but did not want to add any more "dead" weight for balance. Right now the CG sits on about the forward edge of the wingtube and after 8 or so flights we have no plans to mess with it. From its maiden voyage my family has been impressed with how well it holds its lines and has no tendancy to tip stall at slow speeds. In fact, while practicing slow flight and then stalls it really wants to just lower its nose straight ahead and pick up speed. We were nervous about the first landing with the CG out of suggested range but it came in very slow and stable...much better than our H9 Cap (the 70 something" version).