Listen to Andy about mechanically setting first, and about using the locations on the servo arm and control horns. You may need longer servo arms if you can't get enough throw.

Your best bet is to pretend you have a non computer radio until you get everything almost perfect, then use ATV or End Point Adjustment for fine tuning. Once the plane is trimmed in flight, use the clevises again to reset trim settings and only use electronic trims to fine tune if you can't get exact.

Computer radios are great, but they aren't magic.
Dennis-