The trickiest part of a run like this has to be getting dozens of identical parts off the bed without wrecking any of them. The maker handled it by printing everything in arrays attached to central runner strips, then repeatedly flexing the spring steel sheet until the whole assemblies let go. One stubborn black component needed a blue plastic scraper to lift it free, and it got a careful hand inspection right after. That is a tidy workflow for batch production.
The parts themselves are flat rectangular frames with sliding tracks and interlocking rails built into the edges. One of the printed pieces even carries a small attached wire spring mechanism, which is a nice touch in a part meant to be reproduced over and over. Once off the runners, the components were snapped loose by hand and collected into a pile, then slid together one after another, connecting side-by-side and end-to-end. No tools anywhere in the assembly, which seems like a smart call for anything aimed at volume.
The result on the desk is an extended multi-row interlocking grid of rectangular holders, and the before-and-after contrast makes the optimization work easy to appreciate. The runners carry thin white strip sections against the black parts, a small visual detail that stands out in the arrays.
A few things stay open, in my view. The filament material and the printer model behind the run are never identified, nor is the internal hardware of the parts. The intended use of the finished grid is also left unstated, so viewers are left to guess at the final purpose.