Dependence of the DM peak positions (left) as well as maximal DM-galaxy (upper right) and DM-BCG (lower right) offsets on the viscosity cross section σ_V/m_χ while keeping the amount of anisotropy of the differential cross section dσ/dΩ fixed (‘Møller’ cross section Eq. (1) with r = 10⁴). The time-axis on the left is rescaled such as to align the first and second pericentre passage for all models. The DM peaks remain the closer to each other the larger σ_V/m_χ. The offsets increase (roughly linearly) with σ_V/m_χ within the considered range (right column). We note that our results are independent of the choice of critical angle θ_c entering the hSIDM scheme, with offsets for θ_c = 0.1 and 0.3 being compatible with each other. The error bars are computed following Fischer et al. (2021b).