I had been using a standard J-Head for many years and it worked flawlessly......until it melted itself into a plastic blob. So I purchased the famed E3D-V6 3mm hot end. So far I really like it, but I'm sure I can get better prints. The only thing I did was change my thermistor setting to 5 (from 6) and that's it! What else should I do? If I remember correctly my old print head had a .04mm nozzle, which this one does too. My prints look ok, but not as sharp as with my J-head and this thing should out print my old j-head all day long. My last print was just a small pac-man ghost and about a 1/4 of the way up, several rings are slightly staggered. It's really not that noticeable, but I don't think it should be like that. Can you guys direct me to where to even start? I have a Makerfarm Prusa I3, 8" 12v heated bed and I print with 3mm ABS, direct drive, yes the fan that came with the E3D is installed and running.