vasek - the first thing to decide is "how important is ABSOLUTE centering, AND control over travels for EACH servo".... If you want "pattern quality" dual-servo setups, you will have to install the servos such that the MECHANICAL 'neutrals', pushrod lengths, and control takeoffs at the elevator are as nearly-identical as you can get them.
Then, you will need one of those "multiple servo" electronic wizardry deals...I'm only familiar with the JR version, and it permits you to set centers, direction of travel, and total travel in both directions. Once set, THEN you do the rest of the setup from the Tx.

Elevators that don't have exactly the same centers, aren't aligned, and travel different directions can give you frustrations and headaches that you will NOT be happy about.

Were I in your position, with the radio you describe, I'd add the JR gizmo in a heartbeat.

Here's an article on my website, although pertaining to the JR 10X, the mechanical advice is sound. [link=http://www.rcaerobats.net/DualElev.htm]Elevator Setup[/link]