Vernier type multi-nozzle XY-offsets calibration print (0.05mm precision)

Hi,
Inspired by vernier scale, I created this printable scale to measure the XY-offsets for multi-nozzle 3d printing. Theoretically it is able to measure the XY-offsets at 0.05mm precision.

In your favorite slicer, place the two scales on the build plate (along x or y axis). Make sure the zero marks are aligned. Set the main nozzle to print the fixed scale (red one in pic), and the other nozzle to print the test scale. (Yellow one in pic). Slice the file, print it.

Usually just print on