Exploring CE ejectability for a BH binary with a M = 55 M_⊙ giant donor at Z = 0.2 Z_⊙ metallicity as a function of the giant’s radius at the onset of a CE phase. See text for the explanation of different models (a)–(e). Cases where the post-CE separation a_post-CE is greater than the minimum separation required to avoid a merger (marked as a black dashed line for models (a)–(d) and a dashed purple line for model (e)) survive the CE phase.