This looks really great! I love the trim you added, makes it look really professional. How are you attaching the screen? I'm about to build a similar cage and I'm looking for different ideas.
I'm in thre process of building my cage now. I did a 2x4 frame and where the screen overlaps the frame, I went with a couple staples to hold it tight and then did a 1x2 frame for ultra security. Nothings getting through that screen!