I do the bed plane test with 3 points on cartesian printer where bed is not easy to set so this plane data does not change trough time (much) hence I don't want to do the probing before every print, doing it once and then using the same data for months should work but M500 does not store the plane data :(

- any way to store plane data?
- any way to "input" bed plane data trough code?

for e.g. I know that

Bed leveling plane normal= -0.001779, -0.001338, 0.999998

any way I can do something like M### A-0.001779, B-0.001338, C0.999998 ?