Average offsets (μ, indicated by squares; in μHz) and maximum errors (m, indicated by triangles; in μHz) from the full interpolation method, which considers cubic splines along evolutionary tracks and linear (top) or cubic splines (bottom) interpolation across evolutionary tracks and τ_scaled (red) or ρ_c (yellow) as the age proxy, for all ℓ = 1 modes obtained for the interpolated tracks of the initial grid. The vertical brown dotted line highlights the results for our reference track with M = 1.245 M_⊙, while the vertical brown dashed line highlights the anomalous track with M = 1.175 M_⊙.