Finally put tungsten cubes in the cabs of mine today and I have magnets under the fuel tanks, with metal strips to mount under the track on my steep grade. Plus they’ll be doubleheaded. Hopefully that’s enough.
Interesting idea.
Sounds like an idea
@Lemosteam floated years ago, sort of a version of Lionel's O Gauge Magne-Traction. I believe similar idea is also used in T Gauge trains. Let us know how your implementation works