Hi Rick, The 'core' is five 0.020" thick sheets laminated together over a curved surface to put some camber in the wing. The skin in 0.010" sheet with embossed ribs, done with a drafting ink pen (no ink in it), like Woodman has shown in his book. I am skinning the top of the wings and using decal film strips on the bottom of the wings to simulate the rib tapes. The Tommy's wings have very little camber and look pretty much flat.
When gluing the top wing skins on, I mis-aligned the cut out for the ailerons with the first rib on each wing, one being farther from the cut out than the other. This would be very noticeable. So, to hide this, I have sanded the first rib impression off each wing. I figure it was the best course of action short of making another wing. The arrows show where this difference is.

A couple of shots of the mostly finished tail. A lot of stuff going on there.

