Comparison of the tracks computed in the present study and the tracks computed using M − R relations, as in Nelemans et al. (2001a). The blue line represents the track for (M_He, 0 + M_WD, 0, P₀) = (0.43+0.87) M_⊙, 90 min; the magenta line is the part of the track for the same system under the assumption of non-conservative mass exchange; and the cyan line represents the track for (M_He, 0 + M_WD, 0, P₀) = (0.33+0.72) M_⊙, 35 min. Black dots mark RLOF. Green lines indicate the tracks computed using analytic M − R relations for the systems (M_He, 0 + M_WD, 0, P₀) = (0.33+0.72) M_⊙, 35 min and (M_He, 0 + M_WD, 0, P₀) = (0.43+0.87) M_⊙, 90 min (left to right, respectively). The black line is the LISA noise line, and the red line indicates the gravitational waves’ foreground+LISA noise.