I've also been playing around in this area and starting getting somewhat useable around Opus 4.8. It has been able to generate some quite impressive designs, but for me it has been quite hard to get the model to understand what exactly I want modeled.

Are you willing to share your work?

Mine is available at https://jnslmk.github.io/build123d-models/?model=drill_stora... One of the things I've found more useful is the generation of a static site to view and download the models. With WASM you can make minor adjustments directly in browser