Let’s start with the printing first. You can work on the software and electronics while the printer runs the job.
If doing your own custom build — for example, if using a Raspberry Pi Model A+ or a different battery — skip ahead to the next page. The 3D-printed parts are specifically designed around the Pi Zero and components listed previously.
The 3D parts will fit on even the smallest of printers, no problem there. 20% infill works well, and no support material is required.
PLA filament is easiest to work with. If printing in ABS instead, you might need to scale the model up slightly (about 2%) to allow for shrinkage…the parts tolerances are very tight.
No fasteners are used. Instead, parts can be held with small dabs of E6000 craft glue, or cyanoacrylate “Krazy” glue.