My Obelisk Finial
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It's my copy of a decorative element found in an old building in England. Only good as an ornament, or a printer test!
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We visited this National Trust property. It's been lived in by one family for 500 years, now cared for by the NT. Some very interesting. and old, contents. The Finial was (as I remember) part of some bedroom furniture. I took one photo of it (then wished I had taken more) and took rough measurements and proportions from it, and found it surprisingly easy to model, because of the symmetry.
I had no real plan for what to do with the model. The actual piece stands about 50cm (~1'6") high, and that's not going to fit in my CoreOne, anyway! But there are no major overhangs and it looked printable. So in Prusa Slicer I dialled all x,y,z down to 25% and printed this.
As printed, it stands about 120mm high, and uses a whole 7g of PLA because it's a very thin shell. I didn't use supports or a brim. In retrospect I would recommend a brim; I think the lack of brim support was why the top of the spire probably vibrated a bit and did not print as cleanly as the rest. I got away - mostly - without supports.
If I was going to print it again I'd try a 0.25 nozzle and a slower speed. But this (std 0.4 nozzle, with PLA) worked quite well. I might also resize it a bit bigger, say 35%.
It's decorative and a good printer test, and uses very little plastic. Give it a go and let me know in the makes & comments!