Simple slotted rack for keeping mini PC and other equipment vertical

I have a mini PC and two USB hard drives that I store vertically for good ventilation, but they keep falling over when I go to do things in the cupboard. This slotted device stops that from happening. Just pop some rubber feet on it and slot in your equipment.

The model file is created by the AI called Claude to my specific requirements. The photos are of the real printed device in use. I created this to solve a very real problem.