Comparison of CS abundance profiles obtained from RT modelling (blue) and chemical modelling: red - using CS photodissociation rate from Pattillo et al. (2018), green: using CS photodissociation rate calculated from the cross sections from Hrodmarsson & van Dishoeck (2023), based on Xu et al. (2019). The shaded blue region represents the 1σ uncertainty range in the RT model abundance profiles. The circles denote the R_e of the respective models. The red and green error bars on the chemical model R_e denote the estimated uncertainty in the chemical models (Van de Sande et al., in prep.). It is assumed that this uncertainty does not vary significantly with the outflow density and photodissociation rate (see text).