L_X − L_UV relation for the high-spin model with μ = 0.5, α₀ = 0.02 and f_max = 0.9 (empty red points, corresponding to the empty red contour in Fig. 9), with the red line showing best fit slope from emcee. The connected filled points (dark red) show the single-mass trend (log m = 8.7) for varying accretion rate (0.03, 0.07, 0.17, 0.42, 1). For a comparison, the black contour shows where the data lie in the plane, with the related best-fit slope (black line).