The BBC did a programme recently about the Wellington Bomber (the "Wimpy" as it was known to it's crew). It was designed by Barnes-Wallis the guy who designed the bouncing bomb. Anyhow the programme centred around how the factory built one in less than 24 hours. You'd have to have gone some to beat that Alex!
Here is a link to the original film. It's a little bit off topic, but I was reminded of it by your comments of build speed
http://www.nationalarchives.gov.uk/thea ... s_week.htmAndrew