If you've ever thought of upgrading your printer to dual Z drive, you've probably run into the problem that the power supply is in a very bad place.
This simple little model will help you move the power supply under the heated bed.

It compatibles only the ender 3 pro version

You need some M5 screws to mount it.

I modified the original model, as it coverred the ventilation holes of power supply.

You might also want to include a blanking component, as in this position the fan opening is oriented point upwards, anything could fall into it.
Like this one: 
https://www.printables.com/model/253456-ender-3-and-ender-3-pro-fan-silencer-shrouds-for-p/files
But be careful with the hole layout, they are not exactly the same in Ender 3 and Ender 3 pro Power Supply!