mini PC (Brix, Nuc, ...) cooling mount rack stand

Stackable rack for mini PC (Brix, Nuc, ...) for better cooling and silence. The whole thing has 4 bases:
Top base, PC base, FAN base and Bottom Base,
which are connected to each other by standoffs. PC base has 4 x limiters to fix PC in the center of its base.
120mm 12v FAN is used and powered by PC USB 5v, what gives in my case very good result and silence. For that i removed bottom cover of PC and thus cooling (at low speed from USB) motherboard, RAM and M2 SSD. That's enough for me. In case i'd need more cooling it's possible to put the second FAN on the top of the rack (in that case it would need also PC top cover removing).
The thing needs printed parts and a number of hex bolts and hex long nuts to make standoffs (amount and sizes depend on your choice).

Slicer used: Cura 4.0.0