Evening Dave,
Just catching up, but superb photographs as ever - I still say your sneaking some real ones in!! I have seen a comment about 08s shooting off when stood before. Mine hasn't, but it might be something to do with either the project, or as one of your other commentators suggested the ability to run on DC needs checking to make sure its switched off. It could be something to do with the project too I guess, although id have thought it would be more widespread if so - you mentioned it was a Zimo chip, whose project is it?
The model of 47001 looks the business too! As far as I know, all wheel chocks are wooden, certainly the ones I've used are! But that shot of the NRM one is a fairly good style, although a lot of the depot ones, and ones on locos etc, don't tend to have the handle. As you have so much detail on this layout, let us in on the secret for how your going to put them in place on the locos on the layout hehe
Rich