I've been using Cura 3.6.0 with Octoprint and a Tevo Black Widow for a while now. I spent a lot of time upgrading the printer and fine tuning nearly everything over a long period of time. Eventually I achieved near perfect results under nearly all circumstances. My rig is so reliable and versatile that I can't remember the last time I changed anything either hardware or firmware.
However, three days ago without warning, the print quality became horrible. It looked like massive over extrusion, but to an extent that was so severe, that I suspected something else must be defective