Checked fit of cargo bay in fuselage. Then removed components and refit just the baggage floor. The floor is made from balsa wood laminated with fiberglass. Positioned floor in place and drilled up the four bolt holes to secure it to the fuselage structure. Then removed floor from fuselage and trimmed and fit up the elevator pushrod tunnel. Drilled up 9 #30 holes to secure it to the floorboard. And riveted it to the floor with pop rivets. Then painted the floorboard black.