This is a fully parametric, lidless box based on Brett's model. I just optimized the preview in OpenSCAD which was not working for larger boxes.

Changelog:
12/29/2025 - Optimized rendering for preview

Print instructions (orig. from Brett)

Depending on the desired material and parameters this can be a tricky print. It should, however, be possible to possible to print this without supports for pretty much any parameterization. I've been using this model to learn how PETG behaves. PLA should be much cleaner to print this with.

The included gcode and model file are for the box in the photo, which is printed with orange Prusament PETG. It's printed with the 0.20mm Quality preset.