June 14 Update:
If you've been struggling on how to print chassis part. Easiest way is - you can print it in two parts as shown on the last screens and then glue them together
Modified wall mount to make it smaller
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May 29 Update:
Added SKR MINI E3 version at the request of Johnscrub48.
Must be compatible with other Ender 3 stock style mainboards (such as Creality Melzi, FYSETC Cheetah E3and others)
I can't test this version cause i don't have any of this mainboards, so PRINT AT YOUR OWN RISK

Added wall mount to hang electronics on the side of my Ikea Stuva enclosure.

Added back side without fan hole
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Remixed fiftythree33's design.
Turned the PSU upside down. Removed the front cover of the PSU and its fan. Added one 120mm fan rotating at a slow speed, expelling air up from the enclosure. Thanks to this, I got rid of the annoying sound of small fans (especially the power supply fan).
I made the back cover of the case convex, so that there was more space for connecting wires to the PSU.
Also…