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I spent entirely way too much time trying to get one of these style extruders on my Ender 3. Maybe I picked a knock off without realizing it, maybe mine was just defective, I'm not entirely sure.
But it was ultimately the cause for my printer underextruding on certain layers. If you need a new extruder, go for something better than these cheap $20 ones and get an actually decent one.
But on the bright side, my printer is finally fixed! It feels nice to be able to get back into the hobby again.
I love my Micro Swiss dual gear extruder. I have some homemade filament made from PET bottles that won't print on a single gear extruder but prints perfectly on the dual gear extruder.
I'm glad it is working well for you.
I'm probably gonna print a mount for it to make it a direct drive extruder, but for now I am just so glad that it works at all that I kinda want to print other things for the time being. It's been almost 8 months since I last had it working.