Ensures no air is pulled (or pushed away; pull has almost negligible additional performance, apparently) from the ~1mm gap between the radiator and the fans when using Noctua's anti-vibration mounts. Also includes a further 4mm gap for theoretically increased fan performance (and potentially less noise from the blades travelling over the fins), combined with (sharp) slopes that in theory allow the overhang between fan mounting plate and fan to actually contribute to airflow rather than just being a dead zone.
Only verified for the NexXxoS XT45 45mm thick version of the alphacool 184mm / 2x92mm rad with Noctua NF-A9s as that's what I have.
I cleaned up the stringing with a sanding bit on my rotary tool, but then this is the first time I've printed in TPU, and I only bought enough (2x) samples to print this, as I have no other projects in the near future that require TPU, so I didn't experiment to reduce stringing.
The author marked this model as their own original creation.