Abu, a picture is worth a thousand words...have you looked at any the videos on the you tube site. I don't use Airtronics but surely you must have a couple of programmable mixes in there...where you can plug the right elevator into the elevator and the left elevator into aux 1 or 2 and then slave the aux channel to the master elevator. You do the ailerons in the same manner, except IF you have two aileron servos per wing then you are going to need either a matchbox and a Y harness or perhaps one of the buses from Smartfly or Powerbox to match then up. Ideally, you are not going to need a big adjustment if you can keep the geometry symmetrical on the linkages and mechanically adjust the errors out before you start in with the radio adjustments. When matching up the two elevator halves...use a rigid tube (CF works well) mounted to each elevator top snugly with painters tape and the ends extending out behind the rudder on the centerline. The tube ends should nearly touch each other...this will allow you to visually see and adjust the variation out of the entire travel and it should be fairly close if you start with just the sub and end points.