Looks good, so far!
If you cover that wire shelf and ramps with 1/4 x 1/4 hardware screen, you'll greatly reduce the chance of legs and feet getting caught and broken!
I've found covering the shelf, either lengthwise or widthwise or both, with 1 x ? pine, not only gives then a comfortable resting place, but prevents "golden showers" below! Also gives them something good to chew!
Good luck!