The instructions at this point tell you to leave the lower skin and bulkheads upside down and install the stiffeners and longeron on the left hand side. Once this is done, you start to install the phone cable and wiring harness through the bulkheads where the slots from the stiffeners allow. I struggled to keep the stiffeners in place so I cleco’d the longerons on to the bulkheads on both sides and carefully turned the assembly upright.
I supported the assembly with builders tape and inserted the stiffeners and taped them into place.
Dog managed to help by positioning himself to cause maximum carnage. Next up is placing the cables – research required.