G32 mes leveling ? am i doing it right?

here is a video I speed up ( it takes 6 min to level my bed what am I doing wrong) I have used G29 on every printer I have but haven't figured out how to use it on the duet.
questions I have are
do I put G32 in the start Gcode? I read that the mess is stored how can I use that?
is G32 the proper way to level my bed? is there a better way please advise.
I read that mesh leveling this way only stores 5 points so am I doing it wrong?
https://www.youtube.com/watch?v=xJCS6M6FDxM&feature=youtu.be

and here is my bed.g
; bed.g
; called to perform automatic bed compensation via G32
;
; generated by RepRapFirmware Configuration Tool on Fri Feb 16 2018 22:07:26 GMT0700 (Mountain Standard Time)
M561 ; clear any bed transform
G28 ; home all axes
M98 Pdeployprobe.gG30 P0 X25 Y25 H0 Z99999
G30 P0 X125 Y250 H0 Z99999
G30 P0 X325 Y350 H0 Z99999
G30 P0 X125 Y500 H0 Z99999
G30 P1 X25 Y705 H0 Z99999
G30 P1 X250 Y605 H0 Z99999
G30 P1 X450 Y555 H0 Z99999
G30 P1 X600 Y605 H0 Z99999
G30 P2 X885 Y705 H0 Z99999
G30 P2 X785 Y500 H0 Z99999
G30 P2 X685 Y400 H0 Z99999
G30 P2 X785 Y250 H0 Z99999
G30 P3 X885 Y15 H0 Z99999
G30 P3 X600 Y115 H0 Z99999
G30 P3 X400 Y215 H0 Z99999
G30 P3 X250 Y115 H0 Z99999
G30 P4 X450 Y375 H0 Z99999 S
M98 Pretractprobe.g 
You are having multiple P0, P1, P2, P3 so they are overwriting each other
You should have P0 to P16 for your 17 points probe. 
I've always thought 5 points were plenty.
As a matter of fact and I hope I am not misquoting DC42, but I think I read where he said especially with a glass bed that probing just the 4 corners was enough.I have a 300mmx300mm glass bed and I use 5 and it has been perfectly adequate for me. And If I am doing it wrong I didn't know any better.
It only take me about 30 seconds where as you have quite a wait for yours to finish.I probe my bed in an "M" pattern.
Here is my gcode for what it's worth.[[language]] ; Probe the bed at 5 points G30 P0 X15 Y15 H0 Z99999 G30 P1 X15 Y255 H0 Z99999 G30 P1 X150 Y150 H0 Z99999 G30 P2 X285 Y255 H0 Z99999 G30 P3 X285 Y15 H0 Z99999 S

You are having multiple P0, P1, P2, P3 so they are overwriting each other
You should have P0 to P16 for your 17 points probe.Jackal you just pointed out something I never noticed. I have conflicting points too.
Gonna fix that right now.
Thanks!~ 
Thanks I was wondering what that error ment.
And this is a 760x915 plexiglass so I want to probe more points to get a good mesh.

ok that many points don't work i need to get G29 working