I think the 4-6-0 would be the best thing bachmann can come out with cause it can cover all the western styles of engines like RGS, SP, and all other western railroad, but also cover eastern narrow gauge engine for the ET&WNC railroad.
It would not be hard to do all three looks the basics are the same just there are some minor differences it the different types of engines.
It would not be hard to do all three looks the basics are the same just there are some minor differences it the different types of engines.