He uses a laser cutter to cut Mylar sheets into stencils ... If they are exported as DXF files, he explains how to scale them using AutoCAD. The re-sized file is then exported as a PDF.

The same goes for the DXF files for the enclosure panels, which will need to be cut out of orange acrylic with a CNC or (ironically) a laser. Movement is provided by two NEMA 17 steppers and a GT2 ...