Final drilled #30 the 1/8 inch holes common between the attach plates and the rear baggage bulkhead. Final drilled #30 the 1/8 holes in the F-834-1 aft baggage floor common with the F-830-1 left seat floor, F-831-1 right seat floor and the F-807 bulkhead assembly Final drilled #30 the 1/8 holes common between the F-834-1 Aft baggage floor and the F-818-L-1 and R-1 baggage ribs and the F-888-L-1 and R-1 mid longerons Final drilled #30 all of the 1/8 inch holes in the F-831-1 right seat floor and F-830-1 Left seat floor Final drilled #12 the forward two holes for mounting the F-873-1 aft control mount temporarily mounted the F-837-1 aft control mount Match drilled #12 through the F-830-1 left seat floor and F-814C-L-1 inboard seat rib angle and the F-831-1 right seat floor and F-814C-R-1 inboard seat rib angle using the aft two mounting holes in the F-837-1 Aft control mount Removed the F-837-1 Aft control mount. Drilled #40 nut plate attach holes in the F-814C-R-1 left seat floor and F-814C-L-1 inboard seat angle and in the F-831-1 Right seat floor and F-814-R-1 inboard seat rib angle