Dirty map residuals in natural weights for each EB, after subtraction of the model visibilities from the concatenated dataset. Insets zoom on PDS 70c, in the same colour stretch as for the image. Each row, from top to bottom, shows: ‘no visalign, apcal’, without visalign alignment, but after amplitude and phase self-calibration (apcal); ‘visalign, no apcal’: with alignment, but no self-calibration; ‘visaligned, ap’: here with both alignment and self-calibration, and reaching close to thermal residuals; ‘gridded’: also with both alignment and self-calibration, but from the gridded approach (i.e. I_diff in Eq. C.3); ‘restored’: restored maps, obtained with r = 0.3 (as in Fig. 1).