I had a few minutes so I started on the side "bumpers and rear bumpers". The back isn't lined up all that well so I will likely be grinding off a couple tack welds and trying to straighten it up some. The rear "bumper" is 11" deep. I have a Honda generator that I plan on carrying back there so that's the reason for it to be 11" because that's the width of my generator. At this point I'm not sure if I will put a top on the side/rear bumpers. I'm debating between just expanded mesh metal(typically found on small utility trailers, some form of sheet metal or maybe aluminum diamond plate.