Thanks @chaadster!

Yes, I agree, it would add a little more function to have the box on the front. But with the way the frame was configured, it worked out better to attach it the rear tube and the cross tube. It was hard to find a container that was the exact width of the frame so that I could easily anchor it to the sides. Plus then the webbing would have been interrupted down the middle by the cross tube, and would have been less effective.

I'm pretty happy with the webbing so far. It definitely helped to keep it light. I should probably credit warmachine though, I got the idea for the webbing from him.