Two Dividers used for Casting firing Chamber

Both dividers consist of an acrylic rail and a wooden part

  1. A round wooden stick is cut half way through so that it can slide in and out on the rail. This means that the round stick can be removed without removing the rail.
  2. The other divider is a wooden block that fits into the openings cut in the inner and outer tube. The groove on the top is for the vertical rail. The block can be pushed out from its connection with the inner tube. Now this can be pulled up (after 20 minutes). The bock can be seen at the bottom. 

The dividers when removed leave a round hole at the top for the smoke -and at the bottom of the chamber for air and fire wood.