I'm working on redoing some of my enclosed trailer which is a United. It has a toolbox shelf that attaches to 3 studs(not sure what they are called in trailers) and has a back plate that is about 3.5ft tall with gussets going both up and down from the shelf. The weight should be pretty spread out and i have no worries about what the shelf will hold more so the trailer walls. It had a 4 drawer craftsman box on it with not a lot of tools when I bought it. What I want to put on it is my small SM200B Montezuma box that I use on my field pickup in the summer. The box weighs 42#s plus a full set of tools so I'm guessing loaded it weights between 100 and 125#s. Will this be ok or is it going to start bending the wall studs hitting bumps and such going down the road.