You see this 5′ diameter lounge chair attributed to Milo Baughman but I think that’s just one of those internet rumors that gets started and then is perpetuated because it’s just there.
So much nicer!
The seat on this chair is a separate piece from the outer frame. It has these sinuous springs that are attached to a center disc of wood. The springs had a very disconcerting way of kind of collapsing when sat upon, which just wouldn’t do. I started by sticking a blog of firm foam between the upholstery and the disc.
This is the outer frame. The center of that X framing on the bottom was just under the disc of wood—with no support in between whatsoever! So I stapled two coil springs to the base and now it’s got great support and is very comfortable.
I think it’s fine to stay as original as possible when restoring furniture, but if something is wildly uncomfortable and can be made more comfortable—and thus more functional—without changing the outward appearance, then I say GO for it. Life is too short to spend any of it sitting on furniture that feels bad.