Can CH3. And CH4. Be set up to run a servo, or are they only able to be set up as basically an on-off switch? I'm playing with the idea of building a truck with a winch boom for recovery purposes. I am also looking for ideas on stand alone transmitters that aren't expensive that will control a full turn servo for a winch. Most transmitters I have seen, the extra channels are just on-off switches, and I'm looking for full control of the winch servo.