I made mine from a plastic garden cart from K-Mart. It holds everything (more than) I need, Rolls obediently behind me, and I can sit upon it. I wrote a construction article and sent it to the magazines for publication. They rejected it, but you can still get the article from the internet. Other plastic toolboxes work as well.

Also see: "The Field Box From Hell" thread.

http://jcasey02.home.gate.net/flightbox.html