Why bother with the mild setup? You could also just use retracts that fold rearward.

I have flown a quickie which is normally quite tail heavy ( an 1/8" of elevator travel from neutral is full up) with the CG 5% further aft. It was a very interesting flight, since the elevator trim was too course on the Futaba. Pitching up or down was one click of trim, with no position that would fly level. So I gave up trying to trim, and just pulsed the stick to keep it flying. Since this was during a heat race, I did 10 loose laps and landed. Moving the battery pack forward 10 inches corrected the balance. Roughly 2 1/2 oz. In a 3 1/2 lb. airplane.