The biggest problem that I had whilst building the main structure was logistical; it was simply too big to fit in my workshop. This meant that I was forever moving things around to squeeze it in. It is a good job that I decided to make all machine stands and benches on wheels after ruining myself by carrying and lifting when moving into this workshop.
As can be seen in the video and photograph below, I needed to tie each leg together using the rails that the cityscape will sit on. Therefore I needed three legs connected, one either side of the connection plates that I was making.