I spent half the morning watching videos of/about the system, seems like they may be integrating GPS into the system, but most of the videos show setting your grades based off a known bench mark or off your laser. Set bucket on benchmark, enter elevation and go, the system know knows your elevation anywhere you put it in real time, and I'm assuming once you track to a new position you need to reset your bench mark. Using the laser is basically the same but obviously you can move the machine without having to reset your bench mark as long as you can pick up the laser.
At their price point and being incredibly simple I can see this system being invaluable for almost any aspect of residential and commercial construction. no grade man and perfect grades every time, even without the 'auto pilot' feature it's an incredible tool, that's just the icing on the cake. I would definitely like to know more about the system.
