Asymptotic spacing Π₀ as a function of age, for models with different initial rotation rates and overshooting parameters. The left, middle, and right panels correspond to initial rotation rates of Ω/Ω_crit, i = 0.167, 0.333, and 0.5, respectively. The mixing parameter η is fixed at 1 in all models. Each set of curves shows evolutionary tracks for different stellar masses with two overshoot values: f_CBM = 0.005 (solid lines) and f_CBM = 0.025 (dashed lines). Masses for the dotted curves (f_CBM = 0.025) are indicated to the left of each line, while those for the solid curves (f_CBM = 0.005) are placed to the right.