Best-fitting Π₀ values of our Π₀-based asteroseismic modelling, based on three different grid setups (full, spectroscopic, and dynamical). Left panel: results of using a merit function and right panel: results of using an MD merit function. The vertical dashed black line represents the zero-point of the difference between the observational and theoretical Π₀ (i.e. Π_0, obs − Π_0, theo = 0). The error bars are based on 68% HPD intervals of the Monte-Carlo parameter distributions.