Just bought a vintage Mirco table. It came with two kinds of balls. One is the plastic but the others are a little smaller, probably 1-1/4" and look like cork. They are a tanish color and appear to be dirty. I ordered some new cork balls and they are like feathers compared to the ones I have. The ones I have are very "sticky and are really fast! Does anyoune know what balls were originally used with the Mirco's? Are the ones I have just a dense cork or some kind of wood? Thanks in advance.