Edge finished and curved L & R center section side plates. Edge finished and curved L & R landing gear box plates. Separated both F-848-1 upper longeron gussets. Edge finished and curved both gussets. Separated F-8456-1 gussets. Edge finished and shaped all four gussets. Moved fuselage sub-structure to workbench. Clecoed center section to forward fuselage substructure. Clecoed center section side plates in place. Match drilled aft hole of L floor panel to lower longeron. Drilled forward four holes o flower engine mount and installed bolts. Drilled forward half of lower L longeron holes.