The only dumb question is the one not asked, eh Glenn?

However you set things up, you'd like to maximize the travel distance for your cable or pushrod. That way you minimize slop. (Imagine 1mm of linkage slop in a quarter inch of throw versus the same slop in two inches of throw.)

So you'd like to maximize the throw out of your servo wheel. I use the biggest wheel that comes with my servos, cut it into a 'D' shape, and cable to the outermost holes.

On the elevator control surface you will want at least as much distance between the horn holes as you have between the servo wheel holes....if not more. Keep in mind that you have plus and minus forty-five degrees of throw out of your servo and if the holes are the same at the elevator, that's the throw you'll have there.

So here's where you can get some mechanical advantage. You really only need maybe 25 degrees max elevator throw for most pattern flying. So you might lengthen your elevator horns to get that with your servo output throw.

If you stay with the 45 degrees of throw you will probably need to reduce it electronically which will give up some resolution. That's where servo quality, e.g. torque and resolution become factors.