I've got two and on both of mine, I've got one servo per elevator, then one servo each side on the rudder in the back of the fuselage. I did find that two 5955's would get some blowback in the rear on rudder if going full speed. Anything slower and it was fine... Therefore, I upgraded them to 8711's and it flies great with 2 in the rear in a push-pull configuration. For me, this is the ideal config and works very well, easy to setup through the radio, etc. I use the rear tube socket for both planes with the rudder servos in the back. If you have any questions, feel free to pm me.