Hagen Extruder optimized for filament swapping
thingiverse
The encircled filament route aids in hassle-free filament change as it reduces chances of getting stuck. Additional screw holes are provided, with 3.2mm and 2.4mm diameters for direct threading without nuts. Don't forget to drill the filament path before inserting the bolt using a 3.2mm drill. Also, thread the 2.4mm holes while drilling the slits and bigger holes with a 3.2mm drill. I had to file down the large motor platform hole due to elephant's foot printing effect.
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