Bachmann 81499 2-6-0

[JohnAH]

Hello. I wonder if anyone can help me. Im looking to buy one of these moguls but I dont want to get caught out with an old version. I know that the 4-6-0 "Big Hauler" locomotives have five or six different versions with improvements with each. Do the 1:20.3 2-6-0s have a similar development lineage? If so how do I tell? Thanks for any help you can give me.
Cheers,
John.

[Curmudgeon]

No.
All I have seen have been the same, all with polarity switch, differences being detail on various models.

[JohnAH]

Job done.....Thanks Curmudgeon.