Manny,
I assume you mean that in the servo tray, the servos are so close together that the servo arms can't be pointing at each other. If so, forget the reversing harness. Use the standard "Y" and have the servos travel in the same orientation(both clockwise and counterclockwise). Just flip one arm over (no, the servo teeth don't let the arms line up exactly either, but thats OK) and adjust the 2nd push rod until both elevators are equal. Then tighten the pushrod connector whether its an EZ, clevis or ball joint. The servos are traveling in the same direction and so should the elevators. You can adjust for rates and end point equally.