Want to torture yourself further? Want a beyond great first layer in every part of the bed you can get? Or maybe your build plate surface is more like a gravel road? Well then this is the print for you :)

This print matches a 9x9 mesh from the professional firmware defaults. The square sizes are reduced to 10mm because otherwise everything will overlap and it takes a long time to print.

This 9x9 mesh you can use following the original instructions from the original model at the link below and its optimized to work with the Professional firmware which allows you to easily move to, probe and then edit a specific spot in your mesh that is matched to this printable grid.

https://www.printables.com/model/213992-perfect-1st-layers-ender-3-v2-ender-3s1-ender-3s1-

Model includes “fingers” to extend slightly beyond the probed mesh squares in all directions so you can get an indication of how well the print works outside the probe boundaries and to make it easier to remove from the bed.

Note: My experience is you don't need a 9x9 mesh the 3x3 works pretty good for a half decent bed surface. But its fun to see just how far you can take it and the 9x9 mesh does just that.