Hypercube 300 remix for "Der Skorpion" fan duct. E3d and NF-TC01 mounts

Update: After some research into MGN rails, I've made a new 2020 mounted mgn carrier, available here: https://www.thingiverse.com/thing:3497030 I used the der skorpion idea of a duct with angled crossflow air in my new design. This design is EOL, but if anyone wants to keep working on it, go for it. :)

I liked the look of the duct for Der Skorpion so I build compatible blocks for the Hypercube standard layout screw holes. This is designed to accept either 3mm x 6mm magnets for quick change pr