Self propelled front loader

[Rscott417]

If the loader tires actually sit on top of the rails which I kind of think is what will happen, I'm thinking I can split the tire where it lays on the rail and create and inner metal wheel with a flange for electrical pick up then put the two halves of the tire back together. Does anyone have some insight on what type of metal I should use that is thin and can be bent and probably soldered and where can I buy some?

I found a video of the type of front loader operation I'm talking about.
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