This is an upgrade for Elegoo Neptune 2. I have not tested it on the S or D models so can not insure that it will work on them (though would love feed back). It moves both the fans to positions that reduces the change in direction on air flow while also getting airflow in a more focused direction. it also get the air around the nozzle instead of on one side only.
It does require eight M3x10mm machine screws/bolts and two M3x20mm of the same to assemble. I strongly suggest using PETG or other higher temp filament . Sanding the bottom and top of the part cooling duct where it goes around the extruder is also suggested to insure flat surface as much as possible.
IMPORTANT:I have updated the cooling duct section as with long prints it is possible for the duct to heat and deform. IF you downloaded the old duct please download the new one attached.
The large Duct is the only piece that require support.
Printing can be done with either 0.4 or 0.6 nozzle at a 0.1mm layer height
Any questions please ask.
It may fit Creality printers or other that use that same mounting system and fan structure.
The author hasn't provided the model origin yet.