Congrats on a fine build. I saw one of these (full-size) on the telly, it was a US documentary so everything was "as long as so many football pitches" and as "heavy as so many Jumbo jets". I've no idea what he was on about, but got the distinct impression they are big and heavy. They did not mention the top speed (I'd guess about 35kts) but they did show the wake at full tilt; they actually overtake their own wake! For a ship this size to travel at greater than hull speed it's gotta be going some. The footage of the computer controlled gun in action was very good too, I think the documentary was on the History Channel, probably one of the "Mega Structures" series. May be useful for close-up images of the ship?