I use a pull-pull system on the rudder and a dave patrick pushrod for the elevator with 4-40 wires. I run a Magnum 120 4-stroke on it, but I've heard that guys have gone larger yet....
Clint

I use Hitec 615MG servos all the way around. I also set mine up to use twin aileron servos with a direct 90 degree setup from my servo horn to the control horn on the ailerons. I found out in flight that the bellcranks do not work well and causes a great loss of control. I got it down okay but man, I'd sure hate to try that again.