I finally got the package containing PETG filament, heat inserts and a pair of PCI-E risers. And that inspired me to continue with the box, and that lead to having a plan for how exacly im going to do the GPU holders.

Figuring out the GPU Frame

I was inspired by GPU mining rigs. But I did not want to buy one so I will go ahead buy an aluminium L profile which will be the mechanical connection point inbetween the GPU and the meltable plastic. And the 3d printed pillars will determine the height.

Didnt get too far but atleast I now know what I need to do (also fun fact is that the PSU neatly fits inside the frame aswell so that needs some mounting points aswell!