We choose the Σ5, Σ7, Σ9, and Σ11 GBs with the lowest GBE ; we then visualize geodesic paths as "tunnel" plots in a VFZ between each of these and the global minimum Σ3 coherent-twin GB (Figures 6 and 7). This is performed for both the BRK and VFZ-GPR models. These tunnel plots show the predicted energy along the respective geodesic path, together with the 1st-6th nearest data points along the path so that one can compare the predictions to data near each point along the path.