Calibration Matrix - horizontal cavities

This Matrix has ffeatures like horizontal cavities like horizontal holes of different diameters, square holes, inclinated walls and walls of different thicknesses. It's meant for calibrating parameters on the B9Creator, you can priint this on a 50µm pixel setup and Up. No need to rescale, some support surface around the model is bigger than the 50µm xy surface but will simply be cropped in the Slicer...