A simple calibration cube

A simple calibration cube for both XY contour and hole diameter calibration. There seemed to not be a really simple and fast calibration cube available for both, XY contour and hole diameter calibration for people using metric system in MakerWorld. I also am not really a fan of the “X”, “Y” and “Z” markings on the sides of calibration cubes available as they seem to affect the measuring results a bit, so I created a blank model. Use the small line on top layer for aligning with certain axis (It