@colorado hirailer posted:"No love"? Looks like a lot posted above ..was it Athearn? who offered a competing (square side tanks) kit that was my first power adventure when l strayed into HO from 3-rail. The Great Western, that operated the #90 decapod now on the Strasburg, and offered by MTH, had a zoo of tank engines across NE Colorado and into western Nebraska, to do switching at their sugar beet plants. A drive up I-76 NE from Denver to I-80, will show you some beet towers. Whip off the road there and several towns and factory sites have/had various GW tank engines displayed. GW's menagerie included some with home made tenders, and various modifications as well as 0-6-0 versions. I have read that steamers were used well into the diesel era, as beet plants used water pits to unload beets, not compatible with electric traction motors. I have an 0-6-0T Lionel and MTH 0-4-0T mildly bashed and decaled for the GW.
I believe you are referring to the Mantua sqaure tank 0-4-0. It was nice little diecast locomotive and was also offered as an 0-6-0. I think I have both, but it's been a while since I've been through my HO steam collection.