I created case for XL4015 converter, because I cannot find anything suitable.
It is for this converter: https://www.aliexpress.com/item/32830922824.html
DC-DC Converter Step-Down 1.25-32V 5A with LED Display - XL4015
Don't require any tools to assemble. It has buttons printed in place.
I printed it with 0.6mm nozzle. 5 layers top/bottom and 4 walls.
FreeCAD file is included
The author marked this model as their own original creation.