@Tony E. posted:Fantastic insight, thank you so much. This is my first model of an O scale ATSF 2-10-4, so there is still a lot that I have to learn. Definitely a still a nice model with great features; makes a nice addition to my mostly ATSF steam fleet.
Here's how close they are visually.
5011 class 2-10-4:
2900 class 4-8-4: