Next step in the never-ending series of The Portable Workstation (R/T(f)M): K77 Lite, a 11.6L classic layout SFF Case. It allows for CPU air coolers up to 135 mm height, but also a 120 mm AIO, ATX or SFX / SFX-L PSU, and 3 slots, 280 mm max length GPU.
This is just a placeholder for now, but as...
As I need a working AND portable system ASAP, I decided to postpone further fumbling around with the annoying situation (both 280 AIO and 240 AIO vs PSU vs 2nd m2 slot) and pick the "FU edition" aka S400 V2 w/ PCIe 4 riser + AXP120-x67 + Silverstone Air Slimmer.
Little image dump...