John,
Thank you for your extremely well written and, as ever, logical response. I can say no more on how the FADEC issues were resolved, although a change in working practice and increased familiarity played their part. My thrust was that the aircraft has remained essentially unchanged for the last 13 years, despite the fears of some at the time. Many contributors here went on to win medals in the same aircraft.
Clearly professionals wish to know everything they can about the machines they work with and are wary of things they cannot explain.