This is a wall mount for the SimpliSafe Control Panel, that I created after seeing that the manufacturer did not offer it. Created from scratch in Tinkercad after seeing another model online.

This is a tight fit (on purpose) and needs trimming to open it up and doesn't need a bottom hook for that reason. The supportive sides and the firm fit make it very secure.
Printed in White PLA with a 10-15% infill, with support for the center hook.

Creality

Ender 3

10 - 15%

Clearing the support under the hook will take a little effort, but worth it for the firm fit.