Check your aileron trim tabs. You should only have one. I don't have my book to verify, but I believe it should only be on the right aileron. Also, the shading at the Rudder should only exist behind the hinge line. The skin is flat up to the joint on the rear edge of the verticle stab. The rudder is what is rounded off, and should be the only part that's shaded. Last, it looks like you're missing your aileron attach points on the right aileron upper surface.