4 foundations wide. There is an 8m ceiling height from the lower deck. After a bit of testing, I maybe should have gone 9 meters, but it's fine!
I found more pictures accessible from discord, but I'm having problems getting them to post. I'll work it out when I get home this afternoon.
The bends were easy. I did both left and right directions a single deck, one tighter turn, one wider turn. Then stacked those prints for the second deck. The hard part was getting everything EXCEPT the foundations to line up and be coherent. I'll add homebrew light posts from blueprints to slopes and turns after placement.
It will be more of a struggle when I start figuring junctions and merges/splits into the design, having to make one item, like a t-junction, between two different prints. Even the 6x6 blueprinter may not be enough. All of my current prints were done in the 5x5.