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Title: Can't calibrate mine.
Review: Right out of the box my unit's lasers were not aligned to the square and not orthogonal. No combination of turning the adjusting screws, tilting my head, or standing on one foot could make the laser parallel with the square, much less perpendicular to the other leg. Judging by the way the beam moves, I think the designers suscribe to the "Let's wrap an O-ring around the laser and push on it a little to give the impression you can adjust it" school of laser aiming. The trouble is, you can only loosen a screw so far. With no screw on the other side, you can't make it go past the point where screw loses contact. Buy this product if you feel lucky. Others have been. I wasn't.
