Scorpio's Backpack - remix of Scorpio fan duct to allow using 40x40mm axial fans (for Smartrapcore)

The Scorpio's Backpack!

8< - - - - - - - - - - - - - - - - 18 Feb 2018 - - - - - START UPDATE
I've almost done a complete redesign of this project.
It will fork to an inspired to Scorpio, but a brand new THING: the "Alien Blower", so...
STAY TUNED! More to come!
8< - - - - - - - - - - - - - - - - 18 Feb 2018 - - - - - END UPDATE

8< - - - - - - - - - - - - - - - - 06 Feb 2018 - - - - - START UPDATE
I just figured out that the hollow for the hex nut must be a slot, so I have updat