Lucky for you, I made one that you can try out for vibe-CADing.

https://github.com/yuechen-li-dev/Aetheris/

I don't really want to self promote too much here, but currently the other options to do LLM CAD are ecto's vcad, use CadQuery/build123d to access OCCT, or get Onshape for FeatureScript, in case you want to compare the field.

either way, give an actual CAD program like fusion a go. No, not the FOSS stuff- the real stuff. Although, some of them are "close, but no cigar" these days. Not like gimp which is an exercise in self-flagellation.

Because it’s parametric design as opposed to modeling, it inherently lends itself to making it easier to build.

Use metric units when prompting, and Ive even drawn sketches to add to context, and be surprised at how good the outcome can be!