Drilled F-976 skin to seat and baggage ribs and F-904(aft), -905 bulkheads. Turning the clecoed assy on its side and clamping to the workbench provided good access for this.
Disassembled the rear fusulage assy and moved the center fuse section to the 2 sawhorses. Clecoed F-904(fwd) to F-976 and inserted the spacer blocks. Clecoed the F-904H side doublers, L&R, to the sub-assy.