Amazing what a bit of tidying up can do. The space looks so much bigger (and lighter) now!
B1 has been in and out of its frame a few times over the weekend while I've been continuing to lay track and points. Some of the corner joints have not fared too well with the stress of it. I think I might need to do some reinforcement of the section frames. It will also be better, I guess, once the lids go on the back sections.
Not much else to report at the moment: I keep plodding along.