Hello, this is my first ever custom build and I have finished my design and I'm currently having it 3d printed to make sure everything is correct. However, I'm not sure how to get a custom pcb to go along with my board. I know building my own is an option but was wondering if there was companies that manufacture pbcs as I assume they are mass produced for group buys. Yet I have no idea if I'm completely wrong about this so I would really appreciate it if someone could explain it to me. Thanks.