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I have now wasted weeks of my time in trying to get get one single decent print out of the Rostock 301. No success, whatsoever. I even changed to metal extruders, Wade extruder, E3d V6 hotend, increased voltage for stepper motors, cooling fans, and numerous other "tips and tricks". This printer is just not capable in doing its job. My other printers (Flashforge Creator Pro and Tevo Little Monster) are producing parts as expected, or even better. This Geeetech thingy does not. I will give it away to the Fablab of my university and I hope one kid will be able to make something useful out of it. I am fed up with it.