E3D v6, 3 fans in 1 mount, 40mm cooling fan and 30mm layer fans

This is a remix of "E3D V6 fan duct" (https://www.thingiverse.com/thing:2100038) by @rboutrois that allows to mount a 40mm fan for heatsink cooling.

The fan covers are made by @DMC3d_and_more (https://www.thingiverse.com/thing:1431743).

Note:

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