Installed F-883-1 fuel valve bracket, clamped to F-844-L auxiliary longeron, drilled inboard hole to #19, deburred and countersunk for #8 screw. Mounted L & R F-881-1 mid cabin covers and drilled #19 holes to L & R F-844 auxiliary longerons. Removed covers and installed 4 K1000-8 nutplates. Drilled L cover for fuel valve handle. Edge finished F-864B-1 and F-864A-1 throttle quadrant parts.