rctech, please remember that you are working with a 1:1 scale plane that is dynamically unstable in the first place. With out resorting to a pitch gyro to fill in for the flight computer in the F-18 you won't be able to move the CG back to obtain scale like high alpha low airspeed flight as done in the one to one plane. There will be that aft limit that still gives adequate stability that you will just have to live with