Bulkheads, bulkheads, bulkheads. Here is the completed set of aft bulkheads. These will go inside the aft skins to form the rear part of the fuselage. Notice how they decrease in size. Some of them (esp. the small one in the lower center) have various Al bars and angles attached that will be used to mount the tail pieces later. These bulkheads will be used in the next step- and the parts will start looking more like an actual airplane.
There is one more bulkhead I haven't shown, the one just aft of the center section that the seat backs mount against- I messed up a part and had to order a replacement- should be here tomorrow. Once that part is fabbed up and primed, that bulkhead (F-706) will be done.