To borrow a phrase from Britney: Oops, I did it again!
There's been another blunder, this time with the interior.
(This carriage seems fated.)
The re-cast table and seat units went in easily enough in one evening session, and I sat back to admire my handiwork.
It was only a couple of days later when I was looking at it again, and comparing it to 2046 that I realised something was wrong - the single and double seats were on the opposite sides of the carriage.
Which one of them had I got wrong?
I delved back through by research pictures and confirmed that, yes, both carriages confirm to the normal FR / WHR standard of having the double seats on the clock (inland) side.
I had made a very simple error when gluing them into place.
I was so concerned with ensuring that the seat backs lined up perfectly with the window pillars that I failed to notice I had it the wrong way round.
Fortunately, because they are resin and fixed in with superglue it's quite easy to snap them off without damaging them, and I can confirm that they've been replaced in their proper positions this time.
I really to need to start paying attention, though.