Power supply mount

I liked the design from @fourpets, the only change I made is to create a similar piece with an open end.
This allows to take out the power supply without having to use a screwdriver.

This is perfect if you want to store for example a laptop power supply underneath a desk or on a wall.
And even with the open end, my power supply did not fall out (as a desk is normally a quite motionless object).