Laser edge finder for CNC

We moved to Texas form Louisville and in the process of setting up my shop. I ran across this article design for a cross laser that was adapred to the home made CNC. As i and others spend time with aligning the start point, this may be helpful for many.

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What is the width of the line when focused properly? Looks kind of fat in the picture.

With all due respect, Iā€™m thinking aligning a pointed bit to the corner of an object is not all that difficult. Especially if one has designed a project to not depend on the corner zero so much. Just my opinion, I guess, but this seems like an example of over-engineering; a solution waiting for a problem to solve.

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