Thanks for posting the picture! I had completely forgotten that I'd said I'd do so.
The one Mark is holding is the one filled with kitty litter. The one I am holding is full of sand. Both are very heavy, but do respectable spinners on the ground. I think the kitty litter one may perform a bit better. Someone, I think it was Mark, eventually boomeranged one of them.
You can see the acorn nuts that I used as tips....
