3D Printer Bed Leveling.

Replaced the Z endstop phillips head screw with a cap head so I can use an allen wrench.

This works for me, you will need a feeler gauge.  I choose a 4 mm.

1. Moved the Z axis so the nozzle was just touching the table.  Does not need to be perfect.
2. Adjusted the Z endstop.
   
3. Raise the Z axis .4mm  (or whatever feeler gauge you are using)
4. Adjust the bed on all 4 corners so the feeler gauge just ticks the nozzle when passing under it.   If you don't have enough adjustment go back to step 2.

At this point  I can print with a Z offset of 0 in PrusaSlicer.