Time evolution of the log radial position of the zone of avoidance for a population of BSS with masses m_BSS = 1.5m_* (empty circles) and m_BSS = 2m_* (filled circles), initially placed on purely radial orbits. Time is measured in units of 10⁴ dynamical crossing times. The orange circles refer to models employing a Holtsmark distribution of force fluctuations, while the blue circles refer to models where a three-dimensional Gaussian distribution of fluctuations was used. Plotted to guide the eye are a local polynomial regression (solid lines) fitted to the m_BSS = 2m_* zone of avoidance position for Holtsmark (orange) and Gaussian (blue) force kicks. Radial and circular orbits (see Fig. 5) are two extreme cases considered to show that the results are robust to changes in the distribution of BSS orbital angular momenta.