Tornado Fan Duct (by Pasha Linker) remixed for 40x40x20 fan

I downloaded the nice fan duct by user **Pasha Linker** (from FB group *"Flyingbear Tornado Owners"*), but using a 40x40x20 fan the head bumps in the frame so I modded the duct for a lower profile to accomodate the bigger fan.
Lots of wind...;-)

Credits to original designer, **Pasha Linker** ....!!!