Morris,
I'm not familiar with laserscan technology for finding treasures. Although I'm happy with the LRL I own, I'll do some research on this tech to understand it better.
Meanwhile I got really surprised to see all of these RT Examiner and Electroscope lookalikes in the site. With so many models on the same aproach, leads to believe the concept might really work. Electronics and biofeedback. Future is already among us?
http://knouzm.net/en/long-range-locators.html