The building of the shell has progressed somewhat today. I cut the door and staircase holes and glued and nailed the whole structure together. Before I began, I realised my base piece was slightly warped, and had become convex. So I placed it between two saw horses, and nephews helped to bend it back... Once the base was straight, I began glueing the rest. The building of the shell has been quite labour intensive because I decided to have every room with removable walls, which I read about…