On my steam locos, the pick-up wheels are brass; other than needing what seems like a lot of cleaning () they work just fine. In fact (and I think I've mentioned this before), it's remarkable how well these engines run with such a small electrical "foot print".
I was lucky enough to have recently picked up a very nice #630 caboose with the light inside. This particular example has link couplers with brass weights, and some sort of metal (not brass) pick up wheels.
Is this typical, and has anyone any thoughts on whether these metal wheels work any better (or worse) than do the brass ones?
Mark in Oregon