@nelisgast Your accelerations and instantaneous speed changes are very low but I'm not familiar with your printer so don't know what it's capable of. Try upping instantaneous speed change for X and Y from 100 to 600 and the extruder from 200 to 1,000. That's still pretty conservative. For accelerations, try 1,000 instead of 200 for X and Y and double the extruder from 800 to 1600. That's still pretty conservative. You'll know if the machine isn't happy with those settings. Again, you can change them " on the fly" during a print. Oh, and start with pressure advance back to zero, otherwise it will mask any improvement you get. Suggest you play around with acceleration and instantaneous speed with no pressure advance to get the best corners you can, then try gradually feeding in pressure advance.