Anet ET4 Direct Extruder
thingiverse
https://youtu.be/Ba3AIlsnIxY This model Version 2 , design by Cim Simple, without replace your original spare part my advice : use absorber motor stepper & replace the fan for filament with the higher rpm im use GDSTIME brushless DC Fan 24V/0.05A please try & have fun :)
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