I am doing the CG on a Big Stik 60. Although I mounted my OS 75AX as far aft as possible (not the recommended distance), and placed my battery as far aft in the fuse, the plane still is nose heavy using the 4 inches from the wing edge. The manual also gives a range from 3.75 inches to 4.5 inches. At 3.75 inches, the plane balances well. Should I add weight on the back to make it balance at 4 inches, or should I ignore the range? Thanks.</p>