Personally, from your description, I'd use solenoids, but skip the computer control. 1 button & 2 rocker switches......
Are your controls actually all-or-nothing? Most that use cables have some range of adjustment, but that would preclude you from using a solenoid to control them, you'd need a stepper motor or similar.
I'm not sure why you assume you can't control a solenoid with the FB? Output1->Relay->'noid extend, Output2->relay->'noid retract. (assuming latching solenoids)
A stepper motor is only marginally more difficult, using PWM (which seems to be even better supported on the v6)