I am using the MK8 I purchased from you. I may only have that driver set to .45 – Temps should be right. It is makergeeks PETG. I am running at 245-247 (I had good luck with this stuff running 245 on my other printer). Weird thing is I was able to lift the z-axis up halfway and then did a move axis ‘extruder’ and did a +1mm a couple of times on the extruder and filament squirted out beautifully.. I wonder if there is something not setup right in my slic3r software.. I have double checked and it appears that the filament diameter is set right temps look good.. extrustion multiplier matches what your settings say… oh well I will play with it again tomorrow lol.. Thanks for the hints on the driver voltage I know that needs fixed.