Properties of the primaries as a function of the final CO-core mass of the primary star. The markers are colored as a function of M_He−dep, as in Fig. 3. Top: Amount of mass ejected during Case BC RLOF. The empty markers represent the total mass lost via mass transfer, while the filled markers represent the mass shed during mass transfer after Ṁ_ROLF > 10⁻⁴ M_⊙ yr⁻¹ for the first time. Bottom: Amount of helium (circles) and metals (error bars) found in the ejecta. The uncertainty in the metal content derives from assuming M_ns to be within 0.15 M_⊙ of the fiducial value (horizontal marker).