About this 3D model
This is a simple design that I had an idea for that would allow me to detach the stock Ender 3 controller and have it available outside of an enclosure. I modeled 5 SD card, and 15 micro SD card slots into the back, and left room on the bottom for some 20mm square rubber feet if you want to buy some. It took 6 iterations to get the sizings just right, but please let me know if you have any issues with it so I can adjust things.