I started riveting the bottom skin to the longerons. I deviated a little from the plans because I wanted to try back riveting which meant I had to remove the clecoes holding the 1408 bulkhead in place. I left the 1407 bulkhead in place and was able to work around those clecoes. In picture 1 you can see the clecoes to the bulkhead itself are still in place but I had to remove the clecoes holding the rest of that assembly in order to get a flat surface. Be careful when flipping the whole thing over since battery angle assembly isn't attached to the bottom skin. The back riveting worked pretty good but didn't save much time since I had to do small sections at a time while working around the clecoes holding the F1407. Then the cleaveland 3.5" back rivet tool broke again. That's the second time the pin broke off that holds the black sleeve on. The first time was back during construction of the rudder. I hadn't used that method since the rudder and the tool didn't hold up this time either.
Outer longerons back riveted, inboard longerons bucked
I left the 1407 bulkhead attached during the back riveting
