Left: four solutions obtained for the V380 Cyg system and detailed in Table 3. The corresponding MESA evolutionary tracks are shown with solid (dashed) lines for the primary (secondary) component. The RM, IM, CBM, and IM-CBM solutions are shown in black, red, blue, and green, respectively. The more (less) evolved primary (secondary) is shown with filled square (triangle) symbols. Right: changing position of the primary component (open square) associated with a reduced T_eff by 8%. The color coding is the same as in the left panel.