I added servos for the elevator as I figured I needed to offset the extra weight of the Enya 120R in the nose, over 2lbs of engine. With the 2 servos in the rear it balanced out just nice.

I had to stagger them with one in front of the stab and the other behind the stab as there isn't enough width to make the servo installation flush. I also did it this way to keep the elevator pushrods level. The problem I ran into was once I put them in there wasn't enough clearance to get a pull-pull for the rudder or the regular pushrod in there. So I had to put another one in for the rudder.

End result was I had to add 4 oz of weight to the nose. I did put the rudder servo under the elevator servo in front of the stab and on the opposite side of the cylinder head to try and maintain lateral balance. Enclosed is a picture of the final result with the two in the rear on the left side.