Saturn post-fit residuals for the four Cassini datasets. These include the residuals obtained with INPOP17a, where no modelling of TNOs is included (top left); a solution accounting for the individual perturbations of the 9 most massive TNOs (top right); a solution including the TNO ring but none of the massive TNOs (bottom left); and INPOP19a, which includes both the ring model and the individual TNOs. The different colours indicate the 4 range datasets as presented in Table 1.