Cheers Tweety,
yeah, it may look like just a box on wheels but when you get down to the nuts and bolts of it (pun intended...) you realise there's a lot to do!
Not going to do much more to the under carriage now, got it detailed enough I think, moving onto the interior now. I would leave it quite basic inside, but there's shots inside the train too, so if I can I'll use this train for both rather than building a set for that side of the scene.
Funny thing is I'm building all as neatly as I can, but it's going to get trashed for the sequence/still shot anyhow! Much metal carnage!

Will look forward to seeing the progress of your "Haz-Matt", I remember you mentioning that before and it does sound interesting!