How good is my probe?
4 readings on same spot:
SENDING:M48 P4 M48 Z-Probe Repeatability Test Finished! Mean: 0.481688 Min: 0.478 Max: 0.484 Range: 0.005 Standard Deviation: 0.002034
and with 50 readings:
>>> M48 P50 SENDING:M48 P50 M48 Z-Probe Repeatability Test Finished! Mean: 0.482605 Min: 0.477 Max: 0.486 Range: 0.009 Standard Deviation: 0.001970
