I have this kit framed up. I did the following modifications:

A servo for each aileron
Shear web on each wing
Carbon Fiber Landing gear from Moose carbon fiber
Servo in the tail for elevator control
Servo and access hatch midway between the cockpit and the tail for a pull-pull rudder installation
Fiberglass cowl

I have installed a RCV 60 engine. This will swing a scale like 3 bladed prop. The engine is 5 oz heavier that an OS 46. That is why I started putting servos in the tail. I also went with JR DS 368 servos to compensate for the excess engine weight.