Nice steel!

Weakest point is that dang chain.

Almost every time my chains got hit they would separate.

I have seen 2" webbing used because it takes alot of hits before it shreds so much that it lets go.

I've also seen strips of what looked like old tire material (3/8 thick black rubber encased nylon).

You might also want to tack your hangers on the back where they are protected by the steel.

Show us some of the "after" pictures too!

Also, watch out for the sharp edges your roll cage will have after it gets shot.
I learned that the hard way.