Restored images after injections in centre (panels A–C) and periphery (panels D–F) of PSZ2 G120.08-44.41 with different schemes: injection in the original dataset (‘INJ.’, panels A and D), injection in the discrete source-subtracted dataset (‘SUB. & INJ.’, panels B and E), and injection in the original dataset and subsequent subtraction of the discrete sources (‘INJ. & SUB.’, panels C and F). The yellow circle (centred on RA_inj, Dec_inj) has a radius of 3r_e and contains S_inj = 0.8S_inj,tot, where S_inj,tot = 100, 50, and 20 mJy, for panels in Cols. 1–3, respectively.