The fuselage starts its life as a sheet panel; it is then cut and predrilled on a CNC router. Wooden formers are used to hold the cut parts while they are bent into the correct shape. The use of formers ensures that each and every part is reproduced accurately. The bulkhead pieces are assembled on a steel spine, with each bulkhead adjusted to sit in the correct location. Stringers are riveted into place. The skins are then put on with temporary rivets, at each stage of assembly there is multiple checks done to maintain the correct alignment of the air frame.