For that much stuff, I'd simply go out there tonight and put back on the property where it originated and fix my own mailbox, in a much more rigid installation. I recommend a 4x6 post and a
Veeders mailbox. I have one and it's withstood at least one baseball bat hit with only a slight scuffmark. And mine's painted, not stainless steel. The box door sounds like a car door when you close it, and the shipping weight was 65 pounds. We're talking solid. Worth every penney in my opinion.