I'm glad I found this thread. I'm a huge proponent of FNs. My chins started 6 years ago in large parrot cages. Then, I discovered these through a friend. I was lucky in that both times I purchased one, Petsmart price matched with an ad from the internet so I didn't have to have it shipped.
I always try to build the shelves so that they stair-step all the way around the cage. How many of you have watched the chins and then moved stuff around and then watched them, and then moved stuff again? There are so many ways to configure the perfect cage set-up.
Here is my latest showing off some brand new liners I just made:
The hammock is from Carise Chenault. In the middle of the liners are 12" marble tiles that a contractor got for me.