I haven’t really been following these discussions closely because my panels, such as they are, are based on international paper sizes.
One thing that occurs to me is that any specification for physical devices that are supposed to fit well together in a single housing should include standards of tolerance. If I build a case that fits panels exactly 200mm tall and I acquire a panel 205mm or 195mm, it may cause problems. Instead if the specifications define the amount of tolerance to build for, I can build my case confident that anybody else building Kosmo will produce something I can use without worries.
This notion should have been discussed a year ago.