Riveted the OUTBD FWD & INBD FWD seat Rail Supports together, as well as added a bunch of nut-plates to the fuselage rib attach angles. Riveted the nut-plates and spacers to the L & R Bulkhead Side Channels. Drilled and installed the trim control column mount and pre-assembeled the L&R Fuselage Bulkhead Sub-Assemblies. Tomorrow, I plan to start the Fuse Bottom Skin.