Bowden Extruder

This is a quite simple bowden extruder, albeit for a very specific mounting case. I couldn't find a ready-to-use solution so I designed this one from scratch.

My 3D printer is placed in an Ikea housing (Stuva box with glass door) on which I have several of my filament dispenser boxes (https://www.thingiverse.com/thing:2754979). The filament ix fed through the top into the direct drive extruder. This is working fine but I always wanted to try a bowden extruder, just to get familiar with it. This extruder is specifically designed to be mounted on top of the housing, as shown in the images.

Update
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I added a bowden extruder body for the original Prusa i3 MK2/S. It's basically the original part with the motor mount trimmed away. I also added an additional hex nut to keep the top mounting spot (the second one I added was a mistake, ignore it ;-) ).

Since the extruder uses a different drive gear I had to recalibrate the steps/mm for the extruder motor. You can do this