Direct Drive 3mm-GRRF-Hotend Bowden Extruder for Huxley (with removable fan ;-)

Or in short "DDGRRFHEBEFHWRF" 8D

One can never have enough 3D-printers, so I decided to build some Huxleys.
A lot of parts didn't fit or needed some improvements, so I ended up redesigning most of the machine.

Here's the result for the driver/extruder combination and a GRRF 3mm hotend ( https://shop.germanreprap.com/de/Modular-Hot-End-3mm ).

Hotend and bowden can easily be removed by only one or two screws.
The fan is detachable, which comes in handy during machine calibrati