Lets pitch in and buy Founders

[Major 2]

You mention 4-2-4, looking closer the lit'l Beaver engine appears to be a 4-4-4.
That being said, the Vender displaying the IAAPA machines may not have displayed the original, at least the years I recall 

[River City John]

Hmm...; the "4-2-4" wheel configuration on those small engines seems off to someone used to the classic "4-4-0".... 

Or the classic 4-8-8-4 . . .