I made them on my small Chinese lathe. They were actually a pain to make, turning them accurately between centres on a not-that-rigid machine was difficult and took way longer than it should. Happily, though, they all nicely slip into the pockets machined (thousands of miles away!) in the bulkheads. It's amazing how rigid they are, even just finger-tight.

Tonight I finished the faces of the last wheel. Tomorrow I'll probably throw them all on a mandrel and turn the OD. I'll be glad to get past making the nylon parts of the wheels, it's a weird combination of super easy to turn and a schlep because every second pass you have to stop the machine and clear the barbie-hair.