Being serious, now, you can see that Himself has more or less finished the rear unit on 138 apart from the pick-ups, headlamp and something to represent the lubricator reservoir that sits just below the lamp and in between the sand units.
(And of course coal)
And a very fine job he's made of it too!
I thought perhaps you would also appreciate seeing that it is not just a static exhibit. He shot this brief bit of video to prove that all the wiggly bits wiggle as they should.
Now, onwards with the front half. Giddy up Dobbin!