The tower is made using Hirst Arts mold 61 and following the designs for the tower. The only thing I have done differently is that I have based my tower on a cd. The reason for this is that I am making a separate piece of terrain which can "hold" a cd. This means that I can use the same piece of terrain, and interchange various cds, for different setups.

Below are my work in progress pictures.
The minis in these photos are Star Wars Miniatures.