Completeness levels of the ~3200 synthetic sources added on the centre of the background image of W43-MM1. The core catalogue is 90% complete down to 1.6 ± 0.2 M_⊙. Error bars represent the ±1σ uncertainties, measured from the dispersion of mass measurements across each bin (x-axis) and from the dispersion of detection rates between the four set of simulations (y-axis). Blue points represent the full sample of sources detected by getsf, red points only measure the bin completeness for cores that have mass measurements within a factor of two of the reference.