I'm modelling a hard surface object with a combination of hard and smooth edges, and some holes in it. I'm using a WeightedNormal modifier and Auto smooth to get away with less geometry. I've extruded a couple of faces inwards, and cleaned up the geometry within the hole to prepare for bevelling. But auto smooth doesn't work within or just outside the hole anymore. It should be shaded flat, but it's currently shaded as smooth. How can I correct this?