Evolutionary tracks in the (P_orb,M₂)-plane. The initial system configurations are: M₂ = 2.6 M_⊙, P_orb = 1.0 days (red tracks) and M₂ = 2.2 M_⊙, P_orb = 2.5 days (blue tracks). The ONeMg WD has an initial mass of 1.20 M_⊙ and grows to 1.48 M_⊙ when the AIC occurs. After the AIC three tracks were computed for each system depending on the kick velocity applied in the AIC. Here we applied w = 0, w = 50kms^-1 (φ = θ = 0°), and w = 450kms^-1 (φ = 107° and θ = 90°) resulting in different values of P_orb for the post-AIC system. In two post-AIC cases presented here, and in general if the donor star is quite evolved by the time it refills its Roche lobe (i.e. because the post-AIC P_orb is large) and if the donor star is significantly more massive than the newborn NS (1.28 M_⊙), the RLO becomes dynamically unstable and the system evolves through a common envelope (marked by CE).