Case for DC-DC step down converter with XL4015 and CC/CV regulation. I used black PETG plastic and Tipp-EX in engraved text and symbols. Just sand the top of to remove excess Tipp-EX.

Thanks yohabi for the idea.

3D model for XL4015 by Dmytro Shroamer:
https://grabcad.com/library/xl4015-5a-dc-dc-cc-cv-buck-converter-1

Creality

Ender 2

No

No

0.2

10

Print Cover upside down.