Auto_Bed_Leveling: Enhanced G29 command

[Astek777]

Originally I was using 2x2, but generally I've been using 3x3. For the examples above in my original post and further testing I've been doing over the last couple of days I've been using 5 x 5. They all seem to give the same results in the same places.

Here are the results of the M48. I did the 4 corners of my probing square, plus the centre:

M48 x32 y23
RECEIVED: Mean: 2.164063
RECEIVED: Standard Deviation: 0.002223
RECEIVED:
RECEIVED: ok
SENT: M105
SENT: M105
RECEIVED: echo:endstops hit: Z:2.16
endstops hit: Z:2.16

M48 x262 y23
RECEIVED: Mean: 3.819562
RECEIVED: Standard Deviation: 0.001582
RECEIVED:
RECEIVED: ok
SENT: M105
SENT: M105
RECEIVED: echo:endstops hit: Z:3.82
endstops hit: Z:3.82

M48 x262 y253
RECEIVED: Mean: 3.848125
RECEIVED: Standard Deviation: 0.001452
RECEIVED:
RECEIVED: ok
SENT: M105
SENT: M105
SENT: M105
RECEIVED: echo:endstops hit: Z:3.85
endstops hit: Z:3.85

M48 x32 y253
RECEIVED: Mean: 1.183125
RECEIVED: Standard Deviation: 0.001768
RECEIVED:
RECEIVED: ok
SENT: M105
SENT: M105
RECEIVED: echo:endstops hit: Z:1.18
endstops hit: Z:1.18


M48 x149 y172 (X/Y Safe Home Position - Centre of Bed)
RECEIVED: Mean: 2.000750
RECEIVED: Standard Deviation: 0.002634
RECEIVED:
RECEIVED: ok
SENT: M105
RECEIVED: echo:endstops hit: Z:2.00
endstops hit: Z:2.00

Thanks again for your time looking at this.