Line fit parameters for the NC of the Ca II IR (left) and He II lines (right), colour-coded according to their accretion rate (see text). The upper panel shows the RV of the NC line (V_NC), the middle panel the amplitude of the NC line (A_NC), and the bottom panel the Gaussian width (σ_NC). There is no evident modulation of the RV with the accretion rate, and only the line width for the Ca II NC seems to be higher for the higher accretion rates, although this could be also an effect of the presence of a stronger underlying BC. The signatures observed in the NC are thus very robust with respect to variations of the accretion rate within one order of magnitude.