My brother is a scrap rat, always repurposing things.

He was recently given a folding bleacher power unit. Remember the old gymnasium bleachers that slid and "stacked" up against the wall? This is the little buggy thing that pushes and pulls the sections. He was going to pull the electric motor and junk the rest. It was heavier than hell, though. He discovered that the ballast was two 50# pure lead ingots! We have musket food for a while now...