In article ,
Dave Hinz wrote:

Problem with a laser level, is you get a nice straight line, but your
level is only as good as that bubble on that tiny level. For a few
feet, you're probably right on. But, how much error in that bubble would
it take to be off by an inch, at 50 feet? Not a hell of a lot.

If you shoot both ways with the bubble you should have no problem
getting less than 1/4" error in 50 ft.

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