Spent a while today in garage on band saw cutting the boards for the cavern corridors, I had 13 or 14 to cut, got most of them done. New blade on the saw made a huge difference to the speed and accuracy. I have been struggling for a while now with the old blade, so this new one is a dream.
I've also taken some pictures of the caverns themselves, at the moment they are only shaped and the basic layers have been added. Still plenty of work to do on them all.