The cross members on the front side are thicker, wider, and I used longer screws. Interestingly I did not intentionally put those ones on the "outside" of the corner posts. That's just how the whole assembly fit with the pallet below.
I do see what you all mean about the fact that they are outside, being a potential weak point. Since I can't easily move them inside, I think I'll add vertical straps of wood over the ends, and screw them into the corner posts to reinforce the whole side.
Ill be picking up a flexible downspout today so I can begin collecting water.
As I was building this I had the top lid off with a piece of screen over the opening. I kept smelling what reminded me of dawn dish soap. I think there may be some soap residue inside the tank. I recall my neighbor (who purchased the tank, and is only using the cage for firewood) saying something about the tank being rinsed out and cleaned by the seller. Although this soap residue isn't optimal, given the mild nature of the scent I'm not thinking it'll be a real problem. I'd be interested to hear people's thoughts about that.