timbercruiser

Take a piece of 8" PVC and on the bottom end cut a V into it. Cut a round piece of wood and place inside the bottom and screw it in from the side. Fix a bottom tray about 18 or so inches square and screw it to the round bottom. Use treated wood. You will need to get the size of the V just big enough the corn will flow out, but not too much. If you cut too deep you can take a piece of aluminum and screw it over part of the V to help adjust the flow. Make a top with two pieces of wood, one that fits into the top making it harder to get off by rodents, I cover my top piecewith a piece of aluminum to keep it dry inside, and you may need to put a brick on top. I wouldn't make the pipe over about five feet long. No fittings needed.