I almost patented this idea back in 1992 when I developed a manual method to contour a concrete slab before laying wood floors. I pinged individual chalk lines in a matrix grid fashion to determine where there were low places in the concrete slab,,after pinging the chalk lines the low places would have a break in the straight line. I then connected the low places with a chalk pencil to identify areas needed leveling. I did this contouring so that I could later come in and pour leveling compound in the low areas to level the slab out. That way when laying wood planks there were no cavities under the planks where the glue might not make good contact.

I would really like to get this laser. I nominate it for your tool awards as on of the most innovative lasers on the market.