DFW crews rarely lose money on the obvious mistakes. The expensive issues are tiny height shifts that appear after the cure, when light hits a long run, and edges start throwing shadows. They usually begin with small changes in mortar thickness, uneven hand pressure, or a tile that settles after you move on. On commercial builds and housing developments, that "minor" drift becomes rework. In this article, we will discuss what a leveling setup controls, what it won't solve, and habits that keep finishes consistent.