Evolution of the radius and Roche lobe radius for two models undergoing successful envelope ejection from CE evolution. Both models correspond to a simulation of a 30 M_⊙ star with a 14.1 M_⊙ BH with an initial orbital period of 2344 days, with the only difference between the simulations being the efficiency of CE, α_CE = 1 or 0.1. The shaded blue region indicates pre-CE evolution which is identical for both cases. For each case, empty circles denote the moment our algorithm determines that CE evolution would end as the star contracts within its Roche lobe in the absence of mass loss from CE evolution.