I am hooking up the elevator servo and linkage on my 33% Extra and have a question.
What is the best way to get the servos to work in the correct direction of travel. I have one mounted on the right side and one on the left side and they are going to move in opposite directions (the elevators) when I put the power to them. I am using a Hitec Optic 6 channel radio and a Hitec 7 channel receiver, is there a way to connect the elevator servos into 2 different channels on the receiver and then reverse the one servo ?
Thanks in advance

You need a JR Matchbox or a Smart Fly Equalizer. They will take care of matching and reversing one servo.

If your transmitter supports mixing (I'm not familiar with the Optic 6) you can mix the elevator channel to another extra channel (e.g. 5) and reverse it at the same time. Then the second elevator half gets plugged into that channel (ch 5). When you move the elevator stick, both halves will move the same direction. One issue is when you move the elevator trim tab. Depending upon the transmitter, it may or may not affect the slave channel. Ideally, the trim tab will affect both channels as this is what you'd probably want in flight. I have flown planes where the trim tab only affects one of the elevator halves and this works fine. You cannot tell with minor trim changes that only one side is moving.

The Optic 6 has a default trim linked two channel mix for dual elevator servos… You can reverse either servo, center and set the end-points without issue.

The secret to all this is an accurately matched mechanical linkage setup, this simply means the travel arcs of the servos and surfaces are matched, i.e.; fifty degrees servo angle nets forty degrees elevator deflection (the numbers are incidental as long as both side s are matched) of each elevator halve.

I have a 6 channel that will let you mix say channels 2 and 6. Channel 6 is the slave channel (mixer). Your manual should walk you thru it. Only problem is that it will take away your elevator dual rate capability. When dual rate switch is on high both servos work. when on low only one half works. Or you can use a servo reverser, but like MGLAVIN says linkage geometry has to be exactly equal.
3dap

The Optic 6 TX supports trim linked dual channel/servo elevator halve mixing known as "AILEVATOR", high and low dual rate functions work seamlessly.