First layer calibration tool optimized for 0.2 layer height and Original Prusa MK2 bed size. It can be easily scaled to any size. It can be used to check printer's full X and Y capability at low height.
Model as it is should fit into Prusa MK2S 250 x 210 bed size. Thanks to this simple model I realized that I cannot print full size due to position of X axis end position switch. It's position was slightly inwards (by 1.5mm). It ended up with cut off left border of the print. I fixed it. Before the fix I was capable to print it off in 99% scale only.