When I was naught but a nipper I remember watching Blue Peter with my father when they showed something about the maintenance of the BBMF. I asked him why, if the Spitfire was such an excellent aircraft, they didn't build it anymore. His answer was around technology change and the cost of tooling and I thought he meant 'tools' and dwelt on that 'til I knew better. So, moving on, I have a dream (unfulfilled) of being a multi-billionaire and wonder how much it would cost me to build from scratch a Second World War aircraft like a Spitfire, Mosquito or Lancaster. Given that those enthusiasts (looneys) have recently built a steam engine bottom up, why can't I, when my ship comes in, do this?