I checked how level the bed is (when probed with the sensor). For this I used the “Printer Bed Inspector” from Nicholas Piegdon (WARNING! There are some parts in the software you have to adapt to make it work with the Snapmaker, or you will gauge your print bed!)
The red area in the bottom left corner is due to the print surface not sticking down completely to the heat bed.
I turned the print surface to the other side and rerun the test
