One final update to share, because it’s relevant and significant.
I mentioned earlier that the short video was hastily thrown together. I was not at all happy with the herky-jerky low-speed performance, but decided to post it anyway, warts and all.
Earlier today I performed ESU’s auto-tune procedure, and the difference was remarkable … the loco now crawls along as smooth as can be. A quick re-synching of the steam chuffs, and this Mikado is now one of the best runners in my roster.