Nice, but the thread is about reducing rolling resistance (see first post), and no matter how nice, no plain bearing will approach the resistance of a ball bearing... we apparently cannot use needle-tip axles like the smaller scales.
I likewise use ordinary wheels on most rolling stock, but 80 foot passenger cars on steep grades need help unless I double head all consists. Also in my case, the lighted cars have high friction brushes on the backs of the wheels, further compounding the issues.
Greg