I have moved my CG all over on my Global Freestyle. I move it forward for more of a pattern feeling plane and move it way aft for 3D stuff. I don't know the exact measurement of the most aft point I have had it, but I do know I added a couple of ounces to the tail after it was balanced at the aft range of the manual. I had it so tail heavy, I had to add a bunch of down elevator to fly straight and level, and it would hover using throttle and rudder only. I would set it per the manual for the first couple of flights and then start adding weight a little at a time. Good Luck