I wanted something out of the ordinary for one of my scrap metal loads, so I came up with these leaf springs. I doubt they're prototypical for O gauge, but it is possible a piece of machinery or vehicle exists that a 6' and 8' leaf spring might fit. They look good with the load.
At work, I have a foot shear, which I used to cut the leafs, and I flattened some steel wire to use as the banding. This is probably about as small as is practical.
Don