Morson Projects was responsible for the design, analysis and final approval of the entire composite Wing to Body Fairing (WTBF) for the C Series commercial aircraft. This was a very large composite structure (10 metres by 4 metres). This project involved a 100 man team completing the project in a very short timescale of 7 months. This project involved configuration zoning; tolerance/assembly methodology and Model Based Definition (MBD) were used. The first article WTBF was fitted for the first time to the aircraft without any changes.