The fuselage support frame is attached to the nose leg and main undercarriage pick-up points, its base allows the fuselage assembly to be slid out via ramps onto the hangar floor, and is at a comfortable/suitable work height, to prepare wing and empennage mounting points for assembly. Following the fitting of the complete empennage and wings, the standard wing jack points can be used to raise the aircraft to a suitable height to install and secure the main and nose undercarriage. Aircraft is stabilised longitudinally via the tail support point provided in the ventral fin.