Gaia EDR3 CMD, PM cleaned, of the well-known old GCs NGC 3201 and NGC 6553 as proxies for the locus of metal-poor and metal-rich globular clusters. The black points in the left panel are FSR 1776 stars with p_mem > 40%, whereas the right panel shows all stars colour-coded as in Fig. 7 for ease of visualisation. PARSEC isochrones are the same in the left and right panels with parameters from the literature.