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After trying several designs, I've found Mistral-E Cooling Duct (https://www.thingiverse.com/thing:3255518) which worked perfectly on my Ender 5.
Still, it had some room for improvement, so I did it trying to keep the good performance:
- Raised the duct 1mm, to avoid collision while printing.
- Larger and reinforced tabs for the screws.
- Larger screw holes.
Tested with my Warping/Curling test, with great results (https://www.thingiverse.com/thing:3852651).






