At the next stage, lighthouses are set, with the help of which the speed of work ongoing work will not increase, but the error of the slope will be minimized. The installation of the first lighthouse should be made on a thick layer of solution in some distance from the plane of the wall. The second is installed in the same way, but already at the wall of the opposite. By putting the rail on the beacons, you can get the ability to adjust the height of the slope (for this it is necessary to use the construction level).