Interesting to me was the full scale aerobatic guys regarding proper trim.
" Get it about right and then compensate."

It really is simply a matter of how much compensation 'in flight' you are comfortable with.
"comfortable" meaning automatic, IE: un-thought.

My preferred set up for aerobatics is with about 3 to 5 degrees of sink (upright as well as inverted)
That way there is no such thing as 'neutral' !
Tiring but accurate.