“Even just the bearings I used there weren’t great. I’ll have to get some better ones, see who makes your trains around here. But I want this to be as reliable and low-maintenance as possible, and noise is also something of a concern. The more magnetic components we have, the less physical wear, and the less noise. Plus, they can slip freely and catch each other again, so we don’t have to worry about catastrophic failures from that angle. I want to see if they’ll work, first.” You rub your chin in thought. “Come to think of it, magnetic bearings exist too. But there’s Earnshaw’s thorny problem, or I’d need a control system for electromagnets. Honestly, I keep running into problems I’d need control systems for, and that makes things more complicated.”