as far as i know, at that time, they used to let age cast iron for machine tool chassis' for a couple of years. so the chassis came out very strong and it won't vibrate like the newer ones, (from 80's on... but it ain't said).
this is true for italy, but i guess it's true for britain too. british steel is famous to be a very fine product, especially back in the days.
once figured out speeds in relation to materials, tools, (and coolant if you're using it), you'll take some real work of art out of it.
(with new tool materials, you should be able to spin and progress a bit more faster than what you can read on 30-20yo manuals)
just need good flooring and to catch up the end-plays... then enjoy that toy!