As Fig. 4 for models with different RLOF stability criteria. Model set M1 adopting the H02 criterion is shown by the dashed green line. Model set M2 (thin, solid black line) uses the CH08 criterion. Model set M3 with Q_crit = 10⁶ (i.e. RLOF from AGB stars is always stable) is indicated by the dotted magenta line. The top panel shows the entire simulated populations, while in the the bottom panel only CEMP-s stars detectable as binary systems are shown (K_min = 0.1 km s⁻¹ is adopted).