So I was unsure of the method to use closing the wing and riveting the lower inboard skin. On the top skin I was able to back rivet as I had access from the under side being open. I word at a few different techniques before I figured out that starting by riveting the aft spare line first then working up and out from there took the least manuevering. I am happy with the outcome as I was worried I would not have as nice a finish as I did on the top skin. All in all I think its close to the same quality.
