What is everyone's thoughts on the method of attaching the elevator, aileron & rudder horns to the surfaces? The instructions say to drill, then fit screw, then remove again & soak the hole & surrounds with CA & then re-fit the screws. There is no hardwood or ply in these locations, only balsa from what I could feel by having a prod around with a pin on one of the elevators. My feeling is that I should cut in some ply plates to screw to. Has anyone out there used the suggested method & with what results?