Don't bother, unit and replacement unit were both way off out of the box

Even though they are 'self leveling' they were both off by 3/8 of an inch over a 6' run as compared to two known good levels. it's a qc issue because both of them were off by differing amounts, and there's no way to fine tune the level, so I sent the first back, got the second and it was worse. sent it back and chose a more expensive blue brand instead.

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