Underware for openGrid

Custom 3D-printable models for the Underware for openGrid desk mounting ecosystem — "underware"-style holders and mounts for gear that lives under desks, on shelves, and on grid walls.

All models are parametric OpenSCAD sources with print-ready STLs, shared freely with the 3D printing community via Printables and MakerWorld.

Models

Folder	Model	Description
behringer umc202hd/	UMC202HD under-desk holder	Clamshell-style holder that carries a Behringer U-Phoria UMC202HD USB audio interface under a desk or on an openGrid wall, attaching through openConnect slots.

Each model folder contains the parametric OpenSCAD source (.scad). Rendered STLs are kept out of git; grab them from the release listings or render your own (see below).

Customizing / building

1. Install OpenSCAD (the current snapshot build is recommended) and the BOSL2 library.
2. In OpenSCAD, enable the Manifold 3D rendering backend (Edit → Preferences → Advanced) for much faster renders.
3. Open a model's .scad file, tweak the customizer parameters (item dimensions, slot placement, cutouts, …), render, and export an STL.

The STLs are build artifacts and not kept in git — render them yourself with:

make stl    # renders every model to dist/*.stl (requires OpenSCAD + BOSL2)
make clean  # removes dist/

Releasing

Releases are automated with Forgejo Actions (.forgejo/workflows/build-stl.yaml), which renders every model with the OpenSCAD toolchain image and attaches the STLs:

• push to main (or manual dispatch) → STLs stored as downloadable workflow artifacts
• push a v* tag → STLs attached to a Forgejo release

The build image (underware-build:trixie) is itself CI-managed: .forgejo/workflows/build-image.yaml builds the Containerfile with kaniko whenever it changes and publishes it to this instance's container registry as <forgejo-host>/<owner>/underware-build:trixie.

One-time setup for both workflows: create a token with write:package scope (Settings → Applications) and store it as the repository Actions secret PACKAGES_TOKEN (the automatic workflow token cannot read or write packages). Then run Build CI image once (manual dispatch) before cutting your first release:

git tag v26.10 && git push origin v26.10   # publish a release

Credits

• openGrid — wall/desk mounting framework by David D
• openConnect connector system and the holder generator these models are built on — mitufy (opengrid-projects)
• Underware by BlackjackDuck — the original inspiration for under-desk holders

License

This project is licensed under the Creative Commons Attribution-ShareAlike 4.0 International license (CC BY-SA 4.0) — see the LICENSE file.

You are free to print, modify, and redistribute these models, including commercially, as long as you credit the original authors, indicate any modifications, and distribute derivatives under the same license. Individual source files carry their own license headers; the underlying openConnect connector libraries are by mitufy under CC BY 4.0, and the holder generators are under CC BY-SA 4.0.