Hi! I still haven't gotten around to try making one.
However I did come across an interesting one that can also be used for baking pizza or sit next to. I haven't seen anything similar commercially available.
https://jackie.eco/en
It's also made from corten steel.
Curious to hear what you guys think about it? I think it looks quite cool and I like the functions it provides. However I would be a bit worried about Its longevity.
A downside is that it will probably be extremely hot on the outside.
Cheers!