Sorry for raising the topic again, but it is a similar question.
I am looking for pcb metal enclosures, and all I can find are just metal boxes without any holes. I assume I have to drill holes (apertures) for power supply, ADC cables, GPIO, etc. Are there any limitations on how big/how many/distance between/etc.
If I look at simple Faraday cage design it is just a metal mesh.
Also, do I have to ground metal enclosure?