Metallicity distributions of the solution CMD stars for the different selections, binned according to the metallicity seeds used for fitting. The solid line shows the weighted mean count per metallicity bin and the shading indicates 1σ across 100 iterations. For GE (LE) the output of fitting all stars in the parent sample is shown and one random N_S (N_T) sub-sample. The spectroscopic metallicity distributions (using LAMOST LRS DR7), of the 5D selected samples used for CMD fitting, are also shown here in red. Here, the error bar indicates the Poisson noise ($\sqrt{N}$) in each bin.