No I did not work on that ship but i live very close to where they build it, and i saw it when they had the first tests is pretty amazing to see it close, glad you liked it
I thought they came across this way after the Romans left (+- AD 450 ??)..but must have been doing it for a very long time before that to be so skilled...no?
Would they have had steel tools by then? I see they had steel nails.