19 radio M dwarfs studied in this work, along with the designations adopted from this work (Table 2). Targets are designated according to activity and multiplicity, and overplotted on a) a color–magnitude diagram, where we use the Gaia Catalogue of Nearby Stars (Gaia Collaboration 2021) to indicate the main sequence in gray, and b) the empirical Güdel–Benz relation (as described in Williams et al. 2014) with the 1σ spread indicated in the surrounding gray shaded region. The target G 240-45 is hereby not shown on the color–magnitude diagram, as its color is not listed in Gaia. The names of the suggested best MSPI candidates are all listed, and the systems GJ 625 and GJ 3861 – which are further discussed in Sections 4 and 5 – are highlighted in bold.