Change in T_eff, log 𝑔, and [Fe/H] from iterating the spectroscopic reduction with a log 𝑔 fixed to the seismic values obtained using ν_max and T_eff. Changes for a given parameter X are given as ∆X = X_i – X_i+1, with i giving the step in the iteration. In all cases, changes are plotted against the adopted values after the second iteration. White markers indicate values from the first iteration, while blue markers indicate the second iteration. For all nine tiles, combining the changes in the three parameters with their corresponding values, the lower panel provides a zoomed version of the changed from the second iteration. For log 𝑔 the changes from a potential third iteration have been indicated by orange markers. The vertical red dotted lines show, respectively, the solar T_eff, log 𝑔, and [Fe/H] values for reference. In all panels, we have added a dashed red horizontal zero-change line. For ∆T_eff and ∆[Fe/H] we have moved the ordinate position of two points for a better visualisation – these have been indicated with a bold marker thickness and we have provided the actual value of the point.