I made this two person (High Production) grizzly classifier for moving lots of paydirt…for only a few dollars. 1. Stupid folding chair that cuts off the blood flow to your legs….holds a max of 225 pounds. 2. Hardwood flooring found at a dump site. 3. 1/2″ all purpose screen found at any hardware store for cheap. 4. Some good Old Fashioned elbow grease =)