Please see the following link:

http://www.centralhobbies.com/contro.../Bellcrnk.html

I plan on putting together a Venus II ARF, however, due to CG considerations there is a setup for externally mounted dual elevator servos near the back. I've had the headaches of matching dual elevator servos before. Yes I have a computer radio, linkages correct, matchbox installed. I wanted a system whereby one servo could control both halves. This looks to be the answer, however, I'm unsure of how this works. I will not be using the D.E.P.S. system as I need the stuff in the back for CG.