They both run great! Impressive sound, both in quality and volume. The tender does get a bit warm.
One of them discovered an issue with a turnout; the gauge was a hair tight on one of the tender trucks which lead to the discovery that one of the guard rails was shorted to the frog (Atlas C-55) which killed the power when the back of the wheel touched it. I popped the guard rail off, and flash on the bottom had shorted it to the lug for the frog's electrical connection. A bit of filing on the bottom, and it seems fine now...