I just setup my direct drive E3D lite6 hotend (bought from E3D online) on my Printrbot Simple Makers Kit 1405, and I seem to be having major oozing/stringing issues. Right now I'm working with Makerbot clear PLA and Colorfabb White PLA/PHA. I've tried printing from 210C all the way down to 175C. When extruding it's very smooth, but continues to ooze slowly after the motor has stopped. I've also tried printing speeds from 50mm/z down to 20mm/s and nothing seems to fix this issue. Additionally, when I do a cold pull it looks kind of weird. There's a thin leafy bit that branches off the main line of filament (maybe this is a clue?). When I put in the PTFE lining it it looked like I cut it pretty squarely, and I inserted it so that it couldn't wiggle up and down at all. This oozing happens even when doing manual extrusions. Here are some pictures I took... The first shows how the hotend continues to ooze after the print has finished. The second shows the finished print from above (2 threaded pieces) The third and fourth show what happens when I do a cold pull.