Love all these! I keep thinking about that article about making a ring and thinking about trying it myself but I don't think my soldering skills are there. But maybe I should do the thing anyway, there's only one way to get my soldering skills to that level, right? Using round wire is a great idea, makes the inside like a comfort fit band.
For a simple metal band, it's actually not too hard to solder - just put a tiny solder chip on top of the seam, and let it heat up fully. Actually getting a flush seam is a lot harder, and is still something I'm working on. If you do give it a shot, I'd recommend starting with a thick guage (10 or 12) so that it's easy to see everything. There's some very comprehensive tutorials on youtube by the user "AtTheBench", I'll link them after work.