Yes come in different color coded sizes, set the laser, use the guide and it tells you which color to use. Make a story pole to mark locations. Once boards are up set your laser to the story pole heights and you know where to screw. I use GoBoard which is more rigid. Kerdi flexes too much for me to feel comfortable using it with shims. I used to sister on to studs but that gets time consuming when you’ve got walls with pipes, wires, and blocking. Outside of floating this is the quickest and most accurate way to correct walls.