CG is important - It may sound like I don't understand it's importance - I do.
For good aerobatic setups- the CG placement changes the character of the plane.
BUT the shift permissible is very extreme compared to airliners of Airbus size!
The example I related to Ollie was a cg shift of 6" -- on a 15" chord.
The plane was -for all practical purposes "unflyable "
My point was that with the sudden NEW very light wingloading - (the model lost 35% of it's weight) it could now be coaxed to remain upright.
The neutral point was far from the new CG.(with nose section missing)
On really serious flip flop models -the CG is run back past any decent CG point for solid control -in forward flight -however when flown as a "helicopter" -at these very light loadings - the setup works quite well.
Again extremely low wing loadings and high power loadings allow extreme CG shifts.
These models are not scale P51 types with high loadings -It is a completely different ball game -.
I have flown scale stuff (for scale builders) that have -to me- very high wing loadings - I insist that the CG be kept in proper range -when they are tail heavy - they are a handful!