XYZ Calibration Object

This is a tweaked version of a calibration print which I used at a previous workplace. It takes a bit longer to print than the standard 20mm cubes, but allows for more accurate measurements.
The base cross is for measuring the X and Y axis - there is a small arrow to indicate the front of the model and also the Y axis. The notches in the base arms allow for a precise measurement. With the cube, it's possible that you aren't measuring exactly perpendicular with the sides. With this model, th