Comparison between the full-fit runs described in Sect. 3, and the new runs where µ_δ is not taken into account. The best-fit tracks from the full-fit runs, first shown in Figs. 6 and 7, are re-plotted here using the dashed line. The best-fit tracks from the new runs are shown using the solid red line. A new lower limit is enforced on the membership probability from the new runs and the remaining stars are cross-matched with the potential members from the full-fit results of Sect. 4. The common members between the two runs are shown in yellow and those that are not common are shown in dark blue. In this plot we see that the distribution of stars in µ_δ follows the same track as the original runs, even though it was not taken into account.