Residuals from the comparison of the stellar parameters obtained from the FSF approach and the literature values from C07, S10 and C97 and the residuals (FSF – Lit). The red line is the one-to-one correlation. The green line marks the median of the differences (81 K for T_eff, –0.23 for log g and –0.07 for metallicity) which represent the offset between non-C07 and C97 + S10 literature values.