to ensure the new firmware understands your hardware's physical limits. If you'd like to proceed with the update, I can help you: latest stable download link for your specific board version. Step through the Z-Offset calibration Klipper or Marlin is a better fit for your goals. Let me know which version of the T3 you have or what specific issue you're trying to fix! Sunlu T3 / Terminator 3 3d printer review