This mod allows you to mount the power supply of the Ender 3 in the front under the heated bed.

It requires the all in one rear mounted electronics case mod by teaching tech: https://www.thingiverse.com/thing:3688967.

Together, all electronics are bottom mounted, and you gain the benefit that the on/off switch is on the front now. To make room for the psu, i've included some standoffs, to raise the printer up a little. Additionally an angled power cord is needed, to prevent the heated bed to collide. Fusion 360 source files are provided for all remixers out there.

Source files:
https://drive.google.com/open?id=1m1u0jMR6e-9JdoDKr5pqbTpLsSqfDcSF