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For industrial use my group used a laser system that was accurate to better than .010" over 60'. I can't remember the exact numbers but those are pretty close.
We would set initial level/placement and then install permanent targets. At a later date we could come back and use a refective "ball" inserted into the targets to see any change. Initial set up was a ***** but later correction was painless.
System cost a hundred grand or better. Just the damn ball was a couple grand.
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