laser survey pole

This is my solution for fixing up my paver backyard that lacked proper drainage. Using this model and an inexpensive laser level I created a runoff path for excess water.

Procedure:
1) Place your laser level at a stable point at a height such that the laser strikes the pole at a useful height. Perhaps on a paver, or on the ground.
2) Ensure the laser has line of sight to all locations where you intend to measure a height using the survey pole model, and your height adjustments will allow the laser to continue to strike the pole.
3) Identify a reference point and mark the pole at the laser strike point. Its numerical measurement is unimportant. All other measures will be relative to this measurement. You can make those measurements with a ruler, eyeball, your thumb or anything else.
4) Relocate (or print multiple) survey pole(s) to a new location after it (or they) have a reference mark.
5) Note the laser strike point i.e. and adjust the substrate to raise or lower the paver (or whate