Mostly Permanent Magnet Motor with minimal Input Power

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diametric sleeve
kundel mounts sawed magnet rings on the perimeter of the wheels. The sleeve should remain stationary, and the ceramic bearing with a wide ID for the sleeve. The ID of the sleeve needs to be slightly larger then the diametric pictured on the left: the wheels can be joined with a section from a plastic beverage bottle.

This simplified Kundel design makes his elaborate patent obsolete.

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Mach velocity Piezo drive. Sawed magnet rings on the perimeter of the ceramic bearings  with strong constraining safety collars would be a requirement. Piezo controllers can program the chip to oscillate at any frequency: The wheels would be attracted to each other.

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closed rotor cage
we can close the rotor cage by supporting the piezo driver through the tube holes;

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This can lock inside the tube and accelerate to higher frequency. This concept actually represents an entirely new kind of advanced electric motor!

https://www.youtube.com/watch?v=g50f9m6OHcM

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Slip stick Piezo linear motor:

https://www.youtube.com/watch?v=RydSojhrur8