I gave the blue 08 a second coat of paint, then later touched in the white cab handrails and under-runnng board pipes.

I gave it a quick test run on the layout and it completed one circuit before coming to an abrupt halt with one coupling rod detached.

To see if I could recover the missing crankpin, I sent another 08, green D3963 around with a neomagnet (intended as a Hornby Dublo ringfield replacement magnet) attached with some Blu-tack. It came back with two track pins and a few bits of magnetic detritus attached!

In the absence of the correct crankpin, I quickly ascertained that the thread for the pin is 12BA, so used a short 12BA countersunk head screw to secure the coupling rod. I put a small smear of glue on the thread beforehand to ensure it wouldn't unscrew accidentally. The screw head is a little on the large side but once it is painted it won't be all that obvious.

Incidentally, D3963 is also a candidate for possible renumbering. I haven't checked where the original was based at this stage.