One ring to rule them all?

[Rufe0]

I have always thought that the best way to make one of these beasties would be to start with a sheet of 3 mm steel and rent some time on a 2kW laser. I'd go for 3 mm because it has a bit more flex in it so you can key in a few good bends to make it super rigid

Mmm 3mm is going to be real floppy on the straight bits though. Curves give strength yes but you can't make the whole thing a curved surface.

I'm wondering if aluminium would be better as I could use 30mm thick plates to make it up which should be fine to be tapped for 10mm bolts, so tapping into the 30mm width. Would make it a bit simpler and I think just through sheer width would resist bending at the joint.