The Lionel 0-4-0 Shifter is a solid little loco and a very good runner, with surprisingly good sound - and it's scale or close enough, too. I have three, and one or another of them is always on the layout and running. But I've never liked the tenders on them: purely just personal preference - I know why slopeback tenders made sense for locos like these, but I don't like the look. This afternoon I found this very small, cast metal tender in my spare parts box while looking for something for a current project. It came with the only unsatisfactory Lionel loco I've ever bought (ATSF Mogul 573, conventional 6-11272) and is the smallest metal tender, save on the Lincoln Funeral Train, I've seen from Lionel. I realized it would be perfect for the 0-4-0, put aside my current project briefly, to do this one. I had gutted the electronics from this tender a year or so ago but it took only half an hour to transfer everything - speaker, board, IR sensors, volume reostate, etc., from the slopeback to it, and remove the numbered on it (Goo Gone). It looks so much better! I'm doing real coal loads on several loco tenders tomorrow and will put one in this tender, too.
Lionel 0-4-0 Shifter looks better to me with this smaller and squarer tender: it just fits both the size and the character of the loco better.
Here is what it looked like originally. The slopeback tender is five scale feet longer and two scale feet taller.