I'm a little confused about some aspects of trimming an aerobatic model.

If your model is perfectly trimmed, so they say, you will be able to fly a perfect hands free lines on all basic directions: level, 45 deg up and down, verticals up and downs. Now how can this be true if each if for each type of line the wing is significantly loaded differently? e.g for level flight the wing creates lift which is exactly the weight of the plane anf in 45 deg. clibe lift and drag are completely diferent from a level flight?

If the plane pulls to the belly on vertical line, so they say, increase your wing incidence.
How can this be true if the elevator trim position is not changed? as fa as I understand, the elevator will keep the wing in the same AOA regardless of wing incidence change (assuming constant speed is maintained)

Yoav