Body carts. Have you built one?

I'm building one as we speak, I'm about 65 bucks of metal into it. The casters I'm using are rated for 900 lbs each, had them laying around but they are extreme heavy duty units with grease-able ball bearings and grease-able swivels. Metal shop here cut everything to length for me at no charge. I'll get some pics up later in the week once I get her done.