Run a full bed mesh with

BED_MESH_CALIBRATE PROFILE=FULL_MESH PROBE_COUNT=9,9

to generate a mesh of reasonable density and sped balance. We just need a rough idea of how flat ( not level) the bed is warped.

We'll use this in the next setup step

Older versions of Klipper always loaded by default a bed mesh named “default”, yet in later versions (and anything resulting from upgrading the Elegoo firmware) this behavior was deprecated in favor of allow the operator to load a specific mesh. This often occurs in the PRINT_START macro or the Slicer machine start gcode. There's no harm to be sure to set this there, however it's recommended to instead use Adaptive Bed Meshes]] instead that are generated at print time such as with Orca's Direct Adaptive Bed Mesh Compensation.