Mesh Bed Levelling: What amount of variance is acceptable?  

Mesh Bed Levelling: What amount of variance is acceptable?

Hi All! I am having first layer issues so I have been using OctoPrint's Mesh Bed Level Visualizer plugin to measure the MBL variance. I ma following the guides from Prusa but I am still finding it hard to get a good first layer across the entire bed.

Below is my mesh data. Given the scales are supposed to be exaggerated this looks fairly good to me. In reality, a 0.512 mm variance would seem large compared to my typical layer height for printing (0.2 mm).

Is this an acceptable variance the printer can effectively compensate for with auto bed levelling? I'd like to know if I am anywhere in the ball park before going deeper (taking the printer apart to look for faults).

-0.250	-0.121	-0.367	-0.312	-0.304	-0.285
-0.070	-0.129	-0.187	-0.186	-0.172	-0.159
-0.265	-0.136	-0.007	-0.060	-0.041	-0.022
-0.002	-0.022	-0.042	-0.047	+0.049	+0.145
-0.007	-0.094	-0.180	-0.016	-0.005	+0.006
-0.145	-0.165	-0.317	+0.015	-0.059	+0.038