The two tower designs are meant to hold different amounts of dice. For example, the tower with the hinged drawbridge can only hold a maximum of two dice, while the tower with the portcullis can hold up to five. So if you have more dice that you need to roll, the portcullis tower would probably suit your needs better. The two tower designs do require supports, but they are easy to remove if you use tree supports. I designed each tower to ensure a smooth dice roll almost every time. Enjoy!
The author remixed this model.
The model that I remixed was a design for a set of castle tower tea light holders, and I used the design to create the brick wall and crenellations of my two towers. The rest was designed in Tinkercad.