Merge Normal orientation calculations with Custom Orientations, to make it work the same all accross the table: - One or more faces: use average face normal (first edge of faces define tangent) - One edge: use edge itself as normal (vertex normals define tangent) - One vertex: use vertex normal (tangent is perpendicular to normal and z-axis) - Two vertices => edge orientation - Two vertices => face orientation *I tested quite a bit but please report any bugs this might have caused.* ADDED FILE WARNING: source/blender/src/transform_orientations.c