Thanks for the comments.
Pete, I was wondering whether you knew the location of those Brazilian survivors but, of course, it is a rather big country.
Mikkel, I'm not sure I'd like to meet such a bug, it would probably be as big as the model. Yes, the diorama idea was just a passing fancy as I've every intention of getting it to run soon. Having looked at the photos and videos of this work on the Joyce restoration pages, I noticed that the lifting was done with most of the fiddly bits removed from the boiler, so they may well have done the same with overhauls in the past.
Sallydog, Adam, I've just started putting the motor in for some initial running in and testing, so I hope to be able to show the motorised chassis in the next entry.
Nick