As discussed above, the assignment algorithm uses the current values of the atomic environment vectors to match the ghost particles to atoms in the target molecule. Figure examines the periodicity of the assignment calculation, including both extreme cases: fixing the assignments throughout the entire simulation ("fixed", pink) and allowing the assignments to change at every dynamics step ("1", yellow). We find, surprisingly, that fixing the assignments gives adequate performance, and too-frequent assignments can lead to poor assembly performance, especially in larger molecules. Computing assignments every 5000 dynamics steps (blue) also yields good accuracy, while computing assignments every 500 steps (green) did not result in successful assembly of the larger targets.