Edit: i probably had to post this in firmware section sorryHello

I come here today as you are my last chance ahah, i've try many forum / discord / tutorial but can't find a solution.
some days ago i've installed a bl-touch 3.1 on my sidewinder X1 because my bed leveling was not good and i had some wave on the print on some place of the bed.
So people said me this issue was because bed was to close from nozzle, i've try many many manual bedleveling but impossible to get something correct everywhere, so i've buy this BL Touch.
after many buy i finaly manage to wire all and all look like to work, when i print the G29 start, doing 20 point and everything.
I've try to print some square in every angle and here the problem start, i still have this wave, so i've try to doing back my manual bed leveling, offset and everything but the problem was still here ( on top left and top right of the bed ) when middle and bottom right print was correct as you can see on picture:
Bottom right:

Top right:

So i've check the mesh data and here was the result:

then i've try many many thing for 2 days but can correct this problem, i saw my mesh was changing maybe too mutch
0 1 2 3 4
0 +0.051 +0.034 +0.001 -0.014 -0.021
1 +0.036 +0.019 -0.024 -0.031 -0.039
2 +0.119 +0.086 +0.051 +0.024 +0.001
3 +0.094 +0.064 +0.014 -0.004 -0.026
4 -0.056 -0.079 -0.099 -0.071 -0.071
0 1 2 3 4
0 +0.014 -0.011 -0.041 -0.041 -0.051
1 -0.006 -0.036 -0.069 -0.074 -0.079
2 +0.071 +0.036 +0.001 -0.006 -0.041
3 +0.051 +0.014 -0.034 -0.046 -0.061
4 -0.094 -0.126 -0.149 -0.111 -0.116
0 1 2 3 4
0 +0.011 -0.016 -0.046 -0.041 -0.044
1 -0.004 -0.034 -0.069 -0.071 -0.071
2 +0.074 +0.034 -0.004 -0.029 -0.044
3 +0.049 +0.006 -0.039 -0.054 -0.066
4 -0.101 -0.136 -0.159 -0.116 -0.114
So i've print back some piece, screw more my spring for more preassure and finaly on the last 3 try it don't realy change so i think it's ok
0 1 2 3 4
0 +0.247 +0.204 +0.132 +0.064 -0.041
1 +0.204 +0.117 +0.029 -0.076 -0.209
2 +0.262 +0.144 +0.001 -0.136 -0.311
3 +0.247 +0.079 -0.109 -0.286 -0.494
4 +0.099 -0.091 -0.286 -0.469 -0.676
0 1 2 3 4
0 +0.267 +0.197 +0.124 +0.057 -0.034
1 +0.207 +0.107 +0.011 -0.084 -0.204
2 +0.264 +0.137 -0.011 -0.149 -0.314
3 +0.247 +0.069 -0.121 -0.291 -0.494
4 +0.112 -0.089 -0.299 -0.461 -0.674
0 1 2 3 4
0 +0.279 +0.202 +0.117 +0.062 -0.031
1 +0.222 +0.117 +0.009 -0.079 -0.194
2 +0.277 +0.149 -0.009 -0.141 -0.309
3 +0.259 +0.082 -0.116 -0.281 -0.484
4 +0.109 -0.079 -0.294 -0.464 -0.666
as you can see at this step i've not do back my manual bed leveling but the print in bottom right still good and on top right where if i'm right the bed should be -0.666 it still to close from the bed !
i don't understand what can be issue if someone could save me i'll probably thank him for a long time ahah
Sorry if there was some syntax error in my text as i'm not english
Thank you for read me
Kilirt