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I was thinking that too David.
They sell those tiny needle bearings for radio controlled models, even in nylon, they’re the size of a pencil tip eraser, kewl.
Would be interesting to do it and then see how it would perform in comparison to an unmodified model
I see nothing wrong in a little modification/science project as long as it’s done well
It could even be offered as an “upgrade” for a certain cost, of course.