I think that we can all struggle a bit on the physics of all that. Especially how the injections manage to top up the boiler when its at over 200psi. But just how steam pressure generates vacuum but also that this was built in essentially one location from scratch. Not just one but hundreds over time, and banging them out quite fast, even in WW2.
I also admire those who magage to section and made good such thick steel sections. Amazing.
