Cleco all forward fuselage components to the firewall and fuselage. Test fit forward fuselage skin. The skin lines up everywhere except along F-718 L&R longerons. Called VAN's and they suggested to gently hammer down (using wood block) the flanges along the top of the firewall and the center sub-panel. This trial and error method took the better part of two days, but finally eveything lined up. Unfortunately, the rivets on the QB fuselage kit were set, back of the F-902 bulkhead. I decided to leave these alone untill the final installation of the skin when I will have to drill them out to install the skin.