Okay, so I guess I am getting a bit annoying with these help threads, but this is getting a bit out of hand. So, I assembled my bowden setup with the original E3D v6 hot end, and I am getting seemingly random skips on my extruder motor. Not skipping in the hob, but completely skipping steps (going back like half of a turn), The image below shows my printer along with some images of the hot end setup. I've originally used a different hot end mount which I thought didn't allow for enough air circulation, but that doesn't appear to be my issue. Here are the symptoms: The extruder motor will seemingly randomly skip steps, probably half a turn, but hard to measure, moving backwards as the filament bounces back. It doesn't matter if I print stuff which has a lot of retraction or no retraction at all. It doesn't matter which temperature I print on, getting exactly the same amount of skips on 190 and 210 °C. The skips sometimes get worse with time and then suddenly stop, just to return half an hour later. I am printing PLA, specifically Devil Design's black PLA. Here is a full list of things I tried and verified: The cooler fan blows inwards towards the heat sink and is plugged into the always on port on my mainboard. I used a multimeter to verify that it always gives 12V. There is plenty of airflow space for the fan to blow the air in and out. The heat sink is only slightly warm to the touch. The top (where the bowden tube enters) reads around 32 °C on my IR thermometer, and the body around 40 °C. The hot end is properly assembled, with plenty of thermal paste used and the heat break tightly screwed into the heat sink. There is enough pressure in the bowden extruder. The motor itself skips, not the hobbed gear (using an original E3D hob). I also tried to do the cold pull. I heated it up to 210 °C, lowered the temperature the 80 °C and kept pushing the filament through as it was cooling. Once at 80, I tried to pull. Nothing was happening, so I kept upping the temperature by 10 °C, and went up to 140 still without any success. Had red marks on my fingers at this point from all the pulling. When I tried to print again, I found the hot end to be completely clogged.with practically zero extrusion. I tried to up the temperature to 230 °C, pushed it with motor, heard a loud snap and then it started extruding again. Maybe this helps diagnose the issue. Honestly, I am completely lost. My printer is effectively useless right now, and I don't know what to do to fix this. I bought the original because people said they had jamming issues only with clones. If anyone has any ideas or advice, I am willing to listen. I heard that some people add canola oil?