Hi Admin - Here a a few photo's of the Observatory build.
From L to R = The Big Hole! roughly a 2x2x2 cube (actually a bit over that nominal size and somewhat wider at the base). The base - the only bit contracted out to a professional (I mixed and filled the hole / fitted the pier bolts myself). The walls of the metal shed going up. The roof runners being installed. The wheels and guide rail setting up - it works really well!