Amount of mass accreted by the NSs during the post-AIC LMXB phase, ΔM_NS as a function of the duration of the post-AIC LMXB phase, Δt_LMXB. The symbols correspond to those in Fig. 15. Our calculations assumed an accretion efficiency of 30%. The deviation from a straight line is caused by the lower mass-transfer rates |Ṁ₂| ≪ Ṁ_Edd in systems with long mass-transfer timescales. The more mass a NS accretes, the faster is the final spin rate of the resultant MSP (see text).