As is always the case Paul when you raise your B** C********* complaint, you ignore fundamental facts about preserved railways in general. We've gone over this a fair few times over the years. I really don't think you help yourself with the continued complaints about other preserved lines - as a movement the large locos bring in a fair few passengers, and ultimately bums on seats and selling out trains will pay the bills over and above the costs of the larger engines - which normally have a good advantage over smaller engines for timekeeping (something you regularly ignore). I'd love to know who is justifying a 4-8-4. Regarding the civil engineering restrictions - that's fundamentally less about the locomotives and more about fundamental issues with management, compliance, safety, and responsibility, and probably falls outside of this chat.