Finished fitting F828 bottom skin to fuselage to allow clearance from tail sping mount Spent time studying plans for aft top skin match drilling callout Disassembled fuselage per plans and deburred some parts as I went. Repositioned forward section. Reclecoed Center Section to foward bottom skins in preparation for countersinking procedure on bottom skins. Spent some time organizing parts and deburred some parts that had already been primed