Comparison of the observed (crosses) and simulated (lines) cumulative distributions of the peak-to-peak RV amplitudes (upper panels) and of the variability timescales (lower panels). The exponent π (period distribution) is varied in the left-hand panels, while κ (the exponent of the mass-ratio distribution), is varied in the right-hand panels. Values of π, κ and η are indicated in the upper-left insets of each panel. The lower-right insets indicate the VFTS detection probability for the range of parameters specified in Table 5 and for the adopted parent distributions.