Most AI generators optimize for looking right in a preview. Functional makers need the opposite: mates that assemble on an FDM printer - bolt clearance holes that aren't too tight, bearing seats that press or slip as intended, lids that seat without grinding, and shafts that spin instead of seize.
SliceFoundry's Fitment Co-Pilot is built for that audience. In the generator, declare press, locating, sliding, or loose fits for holes, shafts, bearing seats, and enclosure lids. Download STL files biased for real FDM clearances - not just a pretty silhouette.
Open SliceFoundry and enable Fitment Co-Pilot
When you'd rather design a part precisely by hand than generate it from a prompt, Draftr is a desktop CAD application for Windows and macOS that combines AI with organic parametric CAD in an IDE-like workspace. It pairs a full parametric toolset - sketches, pads, pockets, fillets, chamfers, patterns, and threads - with natural-language AI commands, then exports print-ready STL files (and supports STEP-oriented CAD workflows). It's the natural next step once you outgrow prompt-based generation and want precise, editable, parametric models. Learn more at draftrcad.com.