I saw a comment that made me chuckle on another forum recently, can't remember which one. They were reviewing this specific locomotive and someone said "Whoever heard of an outside frame 4-4-0?".
LOL. Some people can be so delightfully ignorant.
I'm really pleased bachmann chose to model this prototype, because it's a beautiful, graceful engine. I loathe inside frame locomotives with the exception of 0-4-0 porters, I think they generally look ungraceful and to me the wheels look "naked". As a result I refuse to have anything other than outside frame steamers on my layout (again, with the exception of 0-4-0 porters!).