Hey Snake. I would offer a word of caution. It is not uncommon for the elevator servo to be mounted to one side. If you don't keep the push rods super straight,(NO BENDS) they can colapse to one side with the high forces on those big elevators. That lets one elevator deflect more than the other one. Boy is that exciting! I'm runing an MDS 148. It seems to balance the plane at 6.25. Elevator throws at 1" on low rate. No snap problems. I moved the elevator servo so the arm hole is dead center at the back of the cockpit right over the pull pull cables to get a straight shot at the pushrod fork. It's really stiff that way.

I have gone to metal gear servos since I have stripped the plastic gears on three of the surface servos in flight. Each time I managed to get back down, but not gracefully. When you lose a gear tooth or two you have no particular neutral on the servo. It's like flying an old galloping ghost system. (Whoops, now you know I'm an old guy.)