Effect of varying cluster sample on the fraction of clusters detected against the number of injected member stars, n_*. Different samples are indicated by the different coloured curves, with the shaded region showing standard error. In the upper panel, CST threshold is varied. In the middle panel, only injected clusters at certain Gaia data densities ρ_data are shown. In the lower panel, clusters are divided into different samples based on the median parallax error of their simulated member stars.