Yet Another Calibration Cube

This is yet another calibration cube. It has a cutout inside which there's a pillar with 3 bridges going in different directions. It helps to check for the following things:

• dimensions (20x20x20 mm)
• ghosting/ringing on debossed/embossed letters
• overhang printing ability (up to 75 degrees)
• bridging (about 10mm)
• retraction (between main body and pillar)
• small features (pillar)