Paul,
I am debating (with myself) to try an impact test today. Packing up a body or two, 2 or 3 lenses, as I normally pack them, and then tossing my Pelican 1514 off the 2nd floor deck of my house onto the lawn below.
Yes, I know, the lawn is not as hard as a road or tarmac, but I don't have a roadway below the deck, and I'm not an independent study lab with access to multiple facilities. So if I try my own impact test , I'll use what is available to me.
-Fish