@frated The BL-Touch acts as the z-axis limit. It will set the z=0 when it probes. The printer wont go past that unless you set the z-offset to a negative value. When you tune it after the auto level you will need to set the offset which should be a negative number but a small one. With the bracket I modeled and printed my z-offset is only .30mm. Your offset will depend on the bracket you used to install the BL-Touch.