OpenSCAD Calibration Marks

thingiverse

You often want to produce 10 identical items in slightly varying sizes, labeling them accordingly, but numbers can be extremely challenging to reproduce, especially quickly, especially when they are small!\r\n\r\nThese 10 binary-like symbols are much simpler to print and remain easily distinguishable even at minuscule sizes. All you require is a 7mm by 7mm flat area to subtract from it.