I've just realized that "E3D V6 fan duct" was a remix of "E3D V6 Fan Shroud" by @carlol (https://www.thingiverse.com/thing:1973156) that already was made for 40mm cooling fan, so I made a job that was already done! : )
The difference between @carlol's and mine is the shroud lenght, being mine a bit more compact, but they are pretty the same.
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