I've posted this question in other Davinci groups as well, to hopefully get an answer
Several months ago, I acquired the above printer to compliment my Anet A8. The first dozen or so prints this thing was AWESOME, pretty much Plug, select model, and play. Then all of a sudden it started going south. First started getting layer shifting, calibrated, did a small test print and it worked. Then went to do a full print and the problem came back with a vengence. Started shifting, extruding in different areas, globbing, getting stuck and then encasing the head in plastic. Cleaned everything up carefully, cleaned the nozzle, feed path, etc. Then tried and the same thing happened.Pulled out a few feet of filament to make sure it wasn't just a bad piece, with no help.