Yeah, I am attempting to find something smaller. I just tried it because I had a cork for a wine bottle lying around. I do have something that may work and I will probably experiment with later since I have to take some new pics of some smaller modern coins that are destined for ebay. I also forgot to pick up a better background.
I use a bit of blu tack....moulded around a pencil stuck into half a potato......seriously! I then stick the potato into a baby milk can lined with black cloth and place a lid on with a square cut out which the pencil sticks out of. The photo of the coin has a very black background this way. Doug got me started with the black background when I saw his impro set up.