Moving the control horn hole before or after the hinge line won't result in more throw in both directions.
What you will get is differential, more movement one way, less in the other, until/if you decide to tweek the end point adjustment via the radio.

What does effect the throw is the height of the control horn hole above the control surface. Longer horns mean less control surface deflection,
short horns mean more deflection.

If you need more movement & can't fit longer servo arms you will need shorter control horns.