I've got a shop in the basement, which means everything goes in or out
down a flight of stairs (and not a very wide one, at that). I've got my
eyes on a Nova 3000 DVR lathe, but at a shipping weight of 181 lbs, if
it can't come apart into smaller pieces, it's a no go.

I'm assuming the headstock, banjo, and tailstock all come off the bed
relatively easily. I'm also guessing the heaviest single piece would be
the headstock, at maybe 75 lbs. Are these reasonable assumptions?