Great project, Trupik . I've a couple of questions for you:
1. It looks like your case was custom-made. Could you share the design (files) with us?
2. I see that you are using the case itself as a heatsink for the nanopi m4 soc but what about the HDDs? How to you keep them cool? I'm a bit concerned about that because the pictures you shared give me the impression that the HDDs are completely closed inside the case, without any airflow (no openings at the top to remove the hot air or at the bottom to get cool air in).
3. I too have a v2. I've run into stability issues with Kernel 5.x but it looks like you have avoided that altogether by going straight to legacy. However, have you had a chance to test the latest Kernel with it? If so, have you experienced any sort of issues, like kernel panics?
Wow. Again, great project. I'll be following it closely and would love to read about it in more detail. --CG