I haven’t made many updates because all the activity has been focused on setting the hundreds of rivets which connect the the ribs, spars and skins. I bucked all the rivets which couldn’t be accessed with the squeezer using the flush set and the tungsten bucking bar. The process involves reaching inside the assembly from the aft (as it’s held in the cradles upright) with one hand to hold the bucking bar and riveting with the other hand. The instructions call for you to work your way up and toward the back of the assembly. In the areas near the center where the stringers attach, the shop-end of the rivet being set aren’t visible, so I used my fingers to locate and hold the bucking bar in place.