I finally splurged and got the E3d Volcano and got away from the cheap Chinese version. Ever since I have I can get a good print. First problem was filament not coming out correctly, prints were all over the place, couldn't get the settings right in my slicer (Cura and Slic3r). So I ordered the standard v6 heat block and went back to .4mm nozzle size. Still problem, now Im having problems with the filament jamming up in the hot end, I've tried 3 diff extruders, taken it apart multiple times to make sure there's not blockages or anything and still the same results. The filament starts popping (hobbed bolt slipping) so I pause the print take out the filament and there is a tiny blob about 1.85-1.95 diameter on the end, I cut it off, reinsert into the hot end and off she goes for about 4-10 more layers before it does it again. Does anyone have any idea of what could be causing this. I put the Chinese hot end back on and Im printing fine so I know without a doubt its the hot end.