Well, I tried to take some pictures of the cage, as promised a week ago, but they didn't come out too great. I'll try again later, but for now this is what I have. I took out some of their toys so you could see the layout of the cage a little better, so it looks a bit sparse right now. That said, whilst I've taken their toys out of the middle floor, I do keep the bottom floor clear so they have a run around area.
The cage is also a little mis-matched as I need to make some colour co-ordinated hammocks for it, and find some matching/co-ordinating wheels and other accessories.
From top to bottom, left to right, we have -
Top left shelf, approx 18 x 10ins
Top middle, two hammocks (because I haven't made any new ones for this cage, yet!)... one single layer hammock and the other double layer for sleeping on or in
Top right, a hook on shelf and food bowl - the food bowl sat too high when I put it on the shelves, so I put it next to an add on shelf and it's much better for height
Under the shelf on the left there is another single layer hammock
Then there is the full middle shelf, with a tissue box, another food bowl with a lift up lid for hiding treats in and a runaround ball made into a bed
Below that floor, on the right, I have another single layer hammock
There is another 18 x 10 shelf on the right, with another water bottle down there
The bottom floor has a 11" comfort wheel, which they love, and a corner litter box with a wire grid, which attaches to the side of the cage. A friend recommended the one with the wire grid to me as she had success with it with her two boys... it seems to be working, but I'll post about that in my litter training post.
Whilst we are home, we hook up a 20 foot clear dryer hose to their cage, which leads across the room to their 3 seater couch. It's great to watch them running backwards and forwards between the couch and the cage.
I still need to do some work on their cage, especially that big open space in the top right corner which is being wasted right now, but we (humans and rats!) are very happy with it so far. For those that were/are considering buying the same cage, I hope this post helps a little bit. You can at least see that there is more than enough room for 2 or 3 rats, and the cage calculator says it's good for 4 or 5 rats. I really would recommend this cage.