I have corrected the center section of the upper wing. It was simple enough. Just modify the shape of the center formers from convex to concave.

The other things that I have completed are the rudder and the landing gear. The landing gear is made from piano wire and attached to the fuselage via a hardwood mount. The gear on the real aircraft looked rather flimsy, and I have to emulate that. The wire will be silver soldered and then have balsa fairings glued to the outside to give the wires a teardrop cross-section.

The rudder was of standard construction (welded steel) and I am going to use laminated balsa for that.