Percent difference of the noise de-biased (CMB + noise + systematics) with respect to the ideal (CMB only), when assuming a non-ideal mapmaking matrix B. The shaded gray region shows the standard deviation of the ideal CMB realizations, normalized to their mean. The parameters with and without the subscript s enter the mapmaking matrix B/TOD matrix A. In each panel, we fix the value of each class of solver parameters (indicated in the corresponding title), except for the solid blue curve, showing (for reference) the case with non-ideal pointing matrix A and ideal mapmaking matrix B. In orange dashed lines, we report the results in the case A = B. In the dashed-dotted lines, we report the results in the case A ≠ B (different colors correspond to different values of the HWP parameters, see legend). In the right-most panel, the case with ideal B (blue solid) is divided by a factor of 10 with respect to the actual signal to ease the comparison with the other curves. The lines are wiggly because of the noise de-biasing. See the text for discussion.