I set up the i3 mk3 kit over the weekends. Today, I printed the calibration sheet posted in assembly-and-first-prints-troubleshooti ... t2981.html. I started with z adjustment of -0.400 and -0.430 and they printed fine. I printed a couple more with -0.415, -0.450 and they all printed with any issues. But, when I got to -0.470, I saw the printed sheet has some scratches. After printing -0.470, I tried again with -0.430, -0.415, even -0.400 and they are now showing gaps on the far left side. You can see these gaps in the attached image. I cleaned the nozzle, re-did the calibration wizard and xyz calibration, but they didn't help. What else should I be checking?