Results of our self-constructed isochrone fitting for various combinations of convective boundary mixing and envelope mixing efficiency, as a function of initial rotation fraction v_i/v_i, crit. The legend at the top indicates the different combinations of η (envelope mixing parameter) and f_CBM (convective boundary mixing). Symbols of the same colour share the same value of f_CBM, while different colours correspond to different values of η. The data points are artificially shifted to avoid overlapping. Left: the Gaia extinction parameter A₀ as a function of initial rotation fraction. Middle: the best-fitting cluster age as a function of rotation. Right: the log-likelihood of the best-fitting isochrone. Error bars indicate 1σ confidence intervals.