[MrForbes]

We used very little metal on our robot this year, aside from the aluminum kit chassis. Most everything else is wood. We used a few pieces of aluminum strap, and a couple pieces of thick sheet aluminum for corner gussets. We also used polycarbonate sheet for the top and bottom, mostly to keep things such as the defenses, boulders, and other robots from getting into or snagged on the innards of our robot. And there are a few pieces of steel strap.