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Print-In-Place Pendulum Letter Scale
A 124 x 124 mm pendulum letter scale that prints in place: a pointer arm turns on a captured 6 mm pin with a 0.7 mm gap, and the frame has calibration notches from 90 to 150 degrees. Clip a letter to the 6 mm hole, fill the 20 mm counterweight pocket with coins or washers to calibrate, then stand it on its foot or screw it up with two M4 / #6 screws.
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