Hi, I recommend kit bashing this plane , personally my CG extra was slightly modified but if I knew what I do now I would have modified more. My wings were foam instead of the wooden built up structures so I don't know how easy the kits ailerons are to mod but make them much deeper, and longer. My ailerons are about an inch from the fuse either side. I recommend looking at a picture of a larger 3d capable plane hovering and see the ratio of aileron size to wing size. The tail-plane is the biggest area of mod. Extend the rudder 1 inch and make the elevator exactly 1/2 of the stabilizer size. My rudder/ ailerons are good but I have standard elevator size and its not capable of solid elevators but still is a dream to torque roll, hover. On top of this its an awesome flying small plane.

Belows pic should show you the control surface size ratios you need. Hope this is of help.

mike
www.rcnz.cjb.net