I had to make this because the v2.0 Bumblebee and Green Hornet ducts are 2 mm wider and 1mm taller compared to the v1.3 ducts that are readily available here on Thingverse.
Printer Brand:
FlashForge
Printer:
Creator Pro
Rafts:
Yes
Supports:
No
Infill:
100%
Notes:
Print upside down (with the notches up) and it won't need supports. All 3 notches are the same size (the OEM ones have one notch that's deeper than the other 2). I've found that using a raft keeps it from being knocked off the print bed.
This also was my first build using Fusion 360 instead of Tinkercad. I'm very much still learning which is why all 3 notches are the same size, I did manage to figure out how to make the duct roughly shaped the same as the OEM one: narrower at the top and wider at the bottom. Dunno if that serves an actual purpose or not =)