What did you do to your trains today?

I've tested the other engines, and (thankfully) they all run except Edward and Emily. It should be worth noting the Edward that's currently in the shed is the C tender type, but the wire coupling seems totally fine from outside. It turned out Emily's tender had a battery the whole time (it didn't leak), which should be more understandable.

Hopefully either of the suggested methods should get at least one of them to do something. The "C tender" drive unit sounds more complex than the flat drives, and I'm sure Sun used to have a repair guide for Edward (not even the Wayback Machine helped me find it if there was one). I'm really glad the other seven are operational.