I wanted to water cool my raspberry pi 4 but there aren't any waterblock mount designs (because it is so overkill) and I had to design it.
An adapter for an Aliexpress cheep water block 30mmx30mm
Aliexpress link (its designed for the 30mm one):
https://es.aliexpress.com/item/32698872296.html?spm=a2g0s.9042311.0.0.aef963c0pAKspW
In the lastphoto you can see the kind of water blocks it is designed for.

I disigned one with holes and other without for the two versions of the 30mm waterblock

Anet A8

No

No

0.2

100%

Just print it with 100%infill with no supports.