Oh my gosh!!! I love that design. I might have to steal the design from you and kind of tweak it myself. I've been lurking around for small quail cage designs here.
I dont have any pics of my full pen i will take some and post them later. I would highly recommend that you use rabbit wire (the square wire) and I myself dont have a wire bottom I used plywood to line the bottom of my quail pen. Our pen was actually a rabbit pen at one time and we found it on the side of the road in perfect condition so we cheated a little but it was a simple build. We have added onto it as well. Check back later tonight (friday) and I will try to pop a few pics on here.