I have a problem with a missing or under extruded layer that consistently shows up in this model. I've changed my retraction settings because it seems to happen a lot on the first layer where the print separates into two print areas. That seems to not Speed Test Scrabble Word Finder Solitaire have any effect. I've varied print temperature from 240C to 250C (ABS) and various temperatures on PETG as well with similar results. The problem shows up on other models as well in various locations, but usually fairly consistent for that particular model. I have put new bowden tubing and nozzle on my printer after a jam lead me to believe that was the culprit, but I have the same problem before and after the jam. I've run out of ideas for trouble shooting.