Things tested in the other build:
1. The new GPU - it got really toasty inside, but seems to work flawlessy 
2. P12 Max - added on top, works as an "outbound" exhaust fan; kept temps at max load below 50 C (hovering around 48 - 49 C)
Finally decided to order the Meshroom S, because there is quite a bit of work thats already "done"; but also because I measured the width of the new GPU, and found out its just 100 mm wide! That allows easily for a 280 mm AIO, and with the Meshroom S being slightly wider than the original Meshi, it should work out much better (may still need a bit of a side extension, but thats whats Etsy / Thingiverse is for).
Thus, I'm going to apply ALL the knowledge I collected so far, to turn it into a true Mesh-mATX v2.0
Actual build might not happen before I move (planning to either go "single", ie. taking a break from living in shared flats for a year or two, or going for a "shared house" instead of the classic shared flat), so roughly in September or October 2023.
Before that, I'm going to rebuild the current system with the knowledge I've been accumulating while reading r/sffpc and r/mffpc - the AP201 seems to be the total hype case currently; there are multiple builds depicting SFF build techniques in essentially an MFFPC case, including insane things like 2x 360 mm radiator (top + bottom) with an SFX PSU + ITX mainboard, 360 AIO + SFX PSU etc.
There is a particular build that really looks impressive, where they moved the SFX PSU to the side and do all the cable routing there, so nothing is cluttered inside the case, and also are using a 3d-printed, 90 degrees rotated PSU cage. Certainly going into this direction, although I'm going to try and see if I might be able to repurpose one of the PSU cages available for the SAMA / NR200 (ordered the ATX PSU bracket / cage for the NR200 recently, originally to use within the other build).
cu, w0lf.
