Center Finding Ruler
thingiverse
Ruler with precision markings in the center for locating the midpoint of objects. I've incorporated centimeter measurements, though they're secondary - their purpose is merely to facilitate identifying the central point. This design allows the ruler to be scaled up or down, and I've kept it at 200mm to accommodate most standard printers. To use this tool, simply align equal numbers on either side of the object in question, and the zero mark will indicate its midpoint.
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