I've tried to get in as close as I can, but my camera doesn't have a great macro setting. If I can get a hold of a better camera, I'll get some more highly magnified pics if possible. In the one really close up pic, you can see a couple of the bristles that stick out still have the sharply angled points. On the bristles more inside the mass of the knot, you can see how the tips are tapered from the sandpaper treatment, and how some of them have started to split. I always think about Edison trying a couple thousand light bulb designs before he found one that worked. Hope springs eternal, man. Maybe I didn't ruin this brush... yet.