Plans: 1. Build top center wing frame. Status: Complete. Pretty uneventful day. The center wing frame went together without significant mishap. Unfortunately the main spars were supplied slightly short of the specified 60". I decided to use them anyway and adjust all the other wing dimensions to accommodate the error. I had just purchased replacement aluminum and eye bolts for the previous problem parts. I was not wanting to pay twice once more the same day. I suppose Robert would have replaced them had I asked but I did not want to wait weeks to continue. I am an engineer used to tight tolerances so the A/A design approach while forgiving presents its own challenges..