Hole slips over a Stas Perlon cord, can use a Stas Smart clip at the bottom, the parts still clip together like the original, but will hang from a gallery rail and hang your hats.
Yes, it can be printed upright, I did paint on supports to get a better sized base.
Let then cool off completely to keep the tabs from breaking off, only lost a couple, and superglue fixed that for me so not a problem.
The author remixed this model.
I inserted a hole down the center of this to allow it to be hung from a gallery cord.