opjose

Both the Bobcat and the Falcon have the rudder servos on the OUTSIDE of the rudder.

You hook both of those servos together with a "Y" cable. It SHOULD NOT be a reversing cable.

Hook up the linkages exactly the same way on both sides and the rudders WILL move in unison, in the same direction.
No reverser is desired or needed.

The elevator has both servos on the inside of the rudder. You CAN use a reverser for one of the servos on the elevator if you wish, but it is much easier just to hook up one of the linkages on one side at the TOP servo horn, and on the other on the BOTTOM servo horn... assuming an "X" horn or a straight line horn with two sides.

I've done both and the latter is just easier to do with no real drawbacks.... other than you have to have your geometry correct ( think dual Helicopter linkage ).