I have got the PCBs for my Tougher INA3221 Power Monitor projects, which of course are matte black. I also took the time to assemble the first test board. So far, I have only tested the buck converter, and it operates as it should, providing +5V. Given that this is my first experience in KiCAD, I have expected that there will be some errors in footprints but, surprisingly, everything is correct and components fit just fine.
The KiCAD design files are available on GitHub, and you can read more about the schematics and PCB design in another post.
Nice board design! Which PCB fab?