Today I pretty much finished up riveting the lower aft fuselage, including F-710, F-711, and F-712 bulkheads, as well as the "keeper" rivets to retain the longeron to the lower side skins before the top aft skins are fitted. There is one rivet hole attaching each longeron to the forward half of the F-711 bulkhead with very poor access for bucking, due to interference from the lateral angle between the HS attach bars. I believe I'll have to use pulled rivets in these two locations.
