MicroCube improved Part Fan Shroud

#Notice
This shroud is obsolete and replaced by my new design https://www.thingiverse.com/thing:3569037

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#Why?
The original shroud was blowing against my nozzle and indirectly cooling the part. I changed the design and pointed the airstream towards the part and away from the nozzle.

#Updates
v3 same height as original, changed the opening to better concentrate the air
v2 is ~1mm lower compared to the original design, beware!