[Waterluvian]

This is a thing I see everywhere. It’s the carpenter who mostly just builds jigs and french cleats for their workshop. Or the programmer who spends far too much time obsessing over what keyboard and font to use.

[krupan]

For a while I kept finding out co-workers were building their own CNC machines, and the mostly used them to make CNC machines components

[CobrastanJorji]

I myself am a 3D printer who mostly prints accessories for 3D printing.