Stars with metallicity [M/H] < −2.5 from the RGB sample in R. Andrae et al. (2023) and our work compared against the MIST isochrones for [Fe/H] = −3.0, −3.5, −4.0. All stars from the catalog are below the isochrones for [M/H]≤ −2.5, which suggested exclusion of some EMP candidates through the cuts used in creating the RGB catalog. We plot the stars removed by the quality cuts we believe could be relaxed to net an increased sample size.