Easy to use. I measured the tilt accuracy (checking how far the laser is pointing up or down) at a distance of 25 feet. Was deflected 3/16 of an inch. I measured twice with the same result. This gives a deflection of 3.2/13 inches at 33 feet. Compared to the quoted 1/13" at 33 feet. Accuracy is more than 3 times worse than max spec. Still need to see if offset is reproducible. Line is there). Good accuracy. 0.6/13" at 33 feet Better than the maximum spec. Vertical accuracy not tested (more difficult to do.) However, if the horizontal and vertical lines are perpendicular to good accuracy (which it should be, since it doesn't depend on the characteristics of the pendulum), the vertical line should be within specification.
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