Edit: I used 1 inch angle iron, not 1/2". Also, to add to the description, I used cardboard to make the template, so I would only have to cut the sheet metal once. I picked up the 4x4 ft sheet metal at a local steel surplus center (The Yard Store) for about $12, plus a box full of used cleecos for less than $10.
PAWN SHOP FIND
RESTORATION IN 1980...
"You can have it all, my emipre of dirt. I will let you down, I will make you hurt"