The Lexan wheel has a flat outer wall, making turning impossible. The solution to this is to add a polyurethan tire that will mount to the Lexan rim, creating a surface that has a radius that changes as you get to the edges, enabling turning.
The mold was created by sandwiching balsa wood sheets together and cutting out the shape. I then sanded the curved outer surface. To increase surface traction I have also added string “treads” that I have glued around the tire. Once I cast this out of a soft urethane, it will solve the turning problem, as well as adding rotational mass, traction, and hopefully increasing gyroscopic forces.