I am working on meshing my cold bed before putting the heater on it, and I seem to be racing to the top with my left and right front corners.
When i start, I am pretty much on the same plane with A,B, and D corners (FL, FR, BL) as well as rear middle probe point, with the C (BR) corner off by anywhere from -.4 to -.7.
If I make even a slight adjustment to the B corner to bring it up a tad, then then next mesh shows, the D corner off by -.4 to -.7. And I just seem to keep racing to bring both corner up and up and up.