examples/periodic_test/driven_duct/tools/cross_section_profile.py reduces the duct's statistics window to the comparisons its acceptance criteria name: the wall- and corner-bisector profiles in wall units, the cross-section's mean velocity and Reynolds stresses for the secondary flow, and the wall-shear distribution. By default it folds the cross-section over its eight symmetry images. Both shipped reducers now also work from the copies picurv init places in a case.