>>528266314
>we thankfully had made advances in metalworking so that we didn't need some poor sods hammering away at a steel plate for months to make a round tube.
And what would those be for example?

Oh wait, you are just WRONG as expected :)
https://www.youtube.com/watch?v=7Yu1gIVT4hA

What do you think they did? went down to their local steel supplier and bought pure bar stock that they gundrilled out? lmao