Upper panel: extent of the PM zone ΔM_pmz in a 2 M_⊙ model as a function of the pulse number for 3 different initial metallicities; [Fe/H] = 0, −0.5 and −1. The LM scheme uses D_min = 10³ cm²/ s, p = 1 and f_over = 0.1 and the DM case D_min = 10⁹ cm²/ s, p = 5 and f_over = 0.1. Middle panel: same but for the mass of the s-process zone ΔM_spro. Lower panel: same but for the dredged-up mass ΔM_3DUP