RE: BVM F-4 CG
Just pulled 6 ozs out of the nose on mine. I am at the back of the box and it flys nice. Took out some of the travel on the stab servo, about 20%. The airplane feels much lighter in pitch.
Planning on an all lipo battery fleet the F-4 is the last hold out. I dropped the 6 cell ECU nicad pack for a 3s Lipo pack. The next step is the 5 cell nicad rx pack but it probably will the cg too far aft.