Multiple layers test

Struggling with calibrating your printer? I am!
After many tries of calibrating my printer from here to the moon, I finally have good first layer. However, when printing an object where the bottom consists of 4 or more layers i can see that I am over extruding a tad. This is purely based on the visuals. According to the math I should be spot on.

I created this tile so you can check both the z offset on the first layer, and multiple layers over or under extrusion.
The tile is 50 x 50 x 1 mm. Print at 0.2 mm layer height, total of 5 layers. Then inspect :)