Ender 3 v2 Neo - Cooling Fan Duct 2x 4020 Fans (Noctua)

Note: For assembly instructions please follow the original post 

Version I:

I initially pritned the Neo Thang cooler for the hot ended of my Ender 3 Max Neo. I however was wondering why both necks were so long. So I shorted both. This makes the printing of it  a bit trickier but with the right settings I managed on the first try.

Print settings:

• Print at 45 deg angle as shown in pictures
• Brim (to support  one layer contact)
• 51 deg Support angle (avoids excess support)

Version II:

In my previous version I shortened the neck of the cooler for ergonomics and style. This time I focused on the performance of the design.

In shorts, I optimized the path of the air though the cooler and widened the exhaust.

Now for those that want to read the story:
I took it a step further this design by improving the airflow significantly. I noticed issues when printing overhangs. When I ran an overhang test I realised the quality was very poor. When I performed a poor man's CFD simualtion with smoke I realized there was no smoke coming from the fins. After some long googling I read there was a ratio to be found between intake and outake. After many prototypes I came with the current design. As the pictures show, it is capable of printing 80 deg overhangs with amazing quality untill about 60 deg overhang. The only downside to the previous deisng is the added weight.
 

This time I printed it at a standard 90 deg

Print settings:

• No speciality this time (maybe tree support if you struggle with the big pipe in the middle