Metallicity profiles calculated from the best model. From top to bottom: radial profile (as a function of the cylindrical radius), the vertical profile, and the azimuthal profile (black lines). The coloured bands show the different uncertainties. In red we mark the sum of the errors stemming from the uncertainties in the data and the vertical profiles, in blue we show the error range resulting from the uncertainty of the underlying dynamical model, and the green bands mark our final uncertainty estimates, which are the sum (in quadrature) of the three. We note that overlapping red, blue, and green appears as grey, and overlapping red and green as orange. Middle panel: the turquoise dashed line represents an uncertainty-weighted linear fit to the model curve.