40 to 30 mm fan with Vent

thingiverse

I want to utilize the stock fan mount for the E3D hot end while incorporating material cooling as well. I designed this in Microsoft 3D Builder. *The duct's wall is too thin, I reinforced it with a thicker wall in V2.* V2's duct might be slightly too long. To avoid interference, I relocated the E3D clip to the top of the fins, ensuring the duct doesn't collide with the surface. On V3, I reduced the duct by 1.5mm. This adjustment provides ample clearance so that the duct won't hit the build platform (below the hot end).