Realized the head of ModBot (the robot not the human) would make a perfect calibration cube with a little modification

Went ahead and modeled it from scratch making the ear cups(?) concave instead of convex so you can measure without problem, made one of them a Y so that you can tell which side is which without killing the look, added a X to the back in the shame shape for the same reason, and made sure it was the standard 20mm size of most other calibration cubes making it another fine addition to your collection.

Made both a rounded edge version and a square edge version with the rounded edge one being more like the actual image of ModBot's head.

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