Since my last entry on this topic soooo long ago I've now managed to add couplings and the hand rails.  Still missing are the vac pipes, the vacuum pipe up the chimney side of the van, (I'll have to hack that one, its missing from my kit), the central lamp irons on the body ends and some writing on the sides (number, tare weight ....). Sadly after the event I found an article in the Scalefour news of a hero's previous efforts at building one of these kits and like me, he had an early production kit which sits almost 1mm too high - I wish I had read that before starting my build.  The issue here was that the chassis was pre-built and so there would be a lot of adjustment to rebuild. Plus the plastic in my kit is amazingly brittle and I've had quite  a few breakages during construction. So, it still sits high and I've tweaked the couplings to it does couple to my other freight ruling stock ... here is a photo to show progress: