I had built the wing structure and sheeted one side with Proskin before I had stopped the build. I was worried about the strength of the wing and landing gear mounts in it. The main spar is laser cut ply as are the ribs that the gear mounts key into and the plywood was not exactly "aircraft quality." In order to strengthen the structure, I laminated the key parts with carbon cloth and epoxy. This added little weight, but increased the strength of the parts immensely.
I also laminated the inside of the Proskin with carbon cloth where the gear mounts were located.
Bob
