I now have all parts and firmware, and everything is in the GitHub. The total cost of all parts in the BOM is $39.91 after sales but not including shipping or taxes. With that, it will probably be a little more than $50. The actual cost of everything (no sales) is $51.05. I didn’t include the 4 screws and nuts because they are optional. The screen will fit as a pressfit in the enclosure, but there are screw holes in case a user wants it more secure. I will be adding screws because I already have some M3s so I might as well. For assembly, I will 3D print the enclosure. I’ll put the switches in the top and then start soldering wires and connecting everything on the perfboard. I’ll use heatshrink for the pins of the keyswitches to make sure they don’t short each other. I don’t have a heat gun so I’ll either use a match/lighter or a hair dryer.