Final inner binary pericentre as a function of the outer binary initial apocentre, both normalised to the initial pericentre of the inner binary for prograde (SET5, top panel) and retrograde (SET6, bottom panel) systems. Binaries maintaining their original components (10 M_⊙ + 20 M_⊙) are identified with blue dots, whereas those exchanging the lighter component are shown with green dots and identify final binaries with component masses 20 M_⊙ + 20 M_⊙. The final binary total mass is identified by the coloured map.