Predicted bulk composition (in wt – %) of a rocky planet simulated for the elemental abundance of HD 27442 (low carbon system). Top panel: B10 planet composition results from four separate simulation runs. We also show our simulations: with a Gaussian FZ (second panel), a boxcar FZ (third panel), and no FZ (bottom panel). The arrows between the first two panels indicate roughly the location of the best correspondence between the Bond simulation and ours.