Remixed mount for 5015 fan and Biqu H2 V2 extruder

I extender the arm that holds the fan by few milimeters and changed the hole to take M4 screw instead of M3: the fan expects M4 holes anyway and it is easier to find longer m4 screws.

I added longholes so the height of the duct can be adjusted. 

I also closed the holes with small supports to help with bridging. Check the screenshot on how to orient the part in slicer. 

Use the fan duct from original part.