Most guys have way more control surface deflection built into their planes than what is necessary to be fully aerobatic. This is why moving the CG back seems so scary to so many pilots. If the controls are first set [mechanically, not electronically] to allow nothing more than what it takes to be functional, then rearward CGs [up to 35% or more] are no big deal to explore. Most conventional models that aren't too heavy fly great at around 28-30% and will fly without too much heroic input inverted even with assymetric airfoils.
Once you get your CG dialed in, then expore more control throw if the plane isn't aerobatic enough for you.
Published CG locations are just a starting point.