Let ${\mathcal{X}}$ and ${\mathcal{X}}^{\prime}$ be snc models, with ${\mathcal{X}}^{\prime}$ dominating ${\mathcal{X}}$. Then $r_{{\mathcal{X}}{\mathcal{X}}^{\prime}}$ maps $A_{{\mathcal{X}}{\mathcal{X}}^{\prime}}$ homeomorphically onto $\Delta({\mathcal{X}})$.