| I just took a look at your wireframe on the previous page, if that's your cleanest model then stick with that
you say the problems are where a vertex is shared, but I think what's causing your smoothing errors there is actually not shared vertices but several vertices very close to each other - close enough to look like just one, it's a classic smoothing error, zoom in on those sections and you should see it, you'll have a couple of points and edges very close to each other where the stencils cross the mesh, if you weld those the smoothing errors should go |