21st century art deco.
Brazil might get a sequel :)

You are definitely masterful in the thin fonts. Somehow I missed this one where you tried more original shapes than usual with very much success. It is surely linked to Art Deco but it also some sort of mechanical, technoish feeling (a bit like if OCRa had been invented in 1920 and not in 1968), what a good way to exploit the limitations of Fontstruct. Each glyph has a true and strong individual personality, but are perfectly coherent when put together, just what I adore. The lowercase are all extraordinary, the & is marvellous. I prefer them to the uppercase which are more directly linked to classic Art Nouveau. May I have a suggestionabout the Q : I think the tail should have been on the exact center of the circle for an optimized effect.
Also, looking at big size, I remarked you forgot a little brick in the hole of the p revealing how giant was the grid you used. I love this one at least as much as SQUARIAL, I hope my little remark about the Q was constructive.

But P2Pnut, this is only usable in small sizes, though. Fontstruct is definitely not conceived for circles, I tried it in big sizes, OMG !, it works well in a text size format, but it is a bit a pity because it has a very strong display potential. I have some non Fontstruct thin art deco fonts, which keep the curves in big sizes but they are far less original, challenging and interesting than yours, I know for now you are only fontstructing, but maybe one day you should try to adapt RM Single Decor to a software more suited for real circles and curves. This excellent design really deserves it.