Yeah, I have done it using an added tether (if not already present) and some tender center-rail pickups. Getting some of these to fit by adaptation is harder work than it seems like it would be. Many variations, and many trucks were not designed to use them, or at least use the ones you can locate (eBay, typically). If you do it, use a 2-wire tether and add the common pickup too, even though most pickup issues on switches and the like are center-rail ones.
The problem is coincidental, of course - that loco on those switches and so forth. Most modern locos have multiple pickups (over 2). That tender pickup is really a nice thing to have, though. One usually does it.
