Normalised mean size distribution at the 99^th percentile and between 150 ≤ Ωt ≤ 200. The top plot shows the PSI run with ten dust species sampled from the GL in blue (run PSI10) and the PSI run with ten dust species uniformly sampled from a logarithmic scale in green (run PSI10_disc.), and the bottom plot shows the PSI run using 20 dust species sampled from the GL in orange (run PSI20) and the PSI run with 20 dust species uniformly sampled from a logarithmic scale in pink (run PSI2 θ_disc.).