I am JEALOUS! You have a waterjet? [X(] I gotta see what it looks like installed!

Oh yeah one thing to consider, you are gonna want to cross-brace the two halves near front and rear and the top for integrity, maybe just some aluminum rod. If it takes a shot at either of those places I think it's gonna bend in toward the chassis. It's going to need to be rigid unless maybe you use Ti or 7075-T6. A carbon fiber cross braced ones would be awesome! Strength and light weight.