Stek
when your airplane is tail heavy the elevator is less precise around center /Neutral
causing you to search for a nice touch on your inverted input
the feeling feels like its nose heavy because you can`t lock a inverted line
with the c/g forward the Elevator is much more responsive and precise
one fast and simple way to test if your c/g is right is by doing a loop
you should be able to use a single elevator input at halve or above throttle
and the airplane will do a very precise loop without further movement of the stick
if you are segmenting your loops and constantly changing you elevator input your prob,,,,,tail heavy.
With a forward C/G,
you will need less total elevator travel and less elevator movement
the inputs will be very forgiving and soft but responsive and easy to hit and hold your mark
hope this helps
Bryan