back view of 19 inch 1U case with acrylic backplate dummy, with power inlet and switch mounted, plus ethernet panel mount https://files.mastodon.social/media_attachments/files/110/413/230/897/678/268/original/eb964ed039f3d193.jpeg
MNT Rack Reform rough prototyping. the unpopulated volume can be used for a GPU or disks and/or UPS batteries and/or fan.