Nice case! Only suggestion I would add is to add a slot and groove around the edge to keep the cover centered so that it does not shift sideways in a backpack and have the cover fall off. Take a look here at how they did this and maybe you can do the same? I don't know design well enough to pull something like that off but maybe you can? Here is an example: https://www.printables.com/model/415323-framework-laptop-expansion-card-holder-4lan?lang=de