Visualisation of the fundamental parameters of the sample analysed in Sanghi et al. (2023, grey circles) and our sample (coloured outlined stars). We note that T_eff is plotted against the IR spectral type. The fill colour is indicative of the mass of the object. Random noise of 0.3 spectral types was added along the x-axis to minimise overlapping points in visualisation. The fundamental parameters were calculated using evolutionary models. The polynomial relations for the old field dwarfs and young moving group members (blue and red lines, respectively) from Sanghi et al. (2023) are overplotted.