Most of this stuff I had lying around. My intention was to make a grill from a 55 gallon barrel with all bolt on parts so when the barrel rusts out I can just cut another barrel, bolt on the parts and go again.
The "next gen", as I've discussed, will have the cradle plate so the barrel is bolted on and thus fully replaceable. I'm making this one for my son:
The cradle plate I bend with a sledge hammer until it matches the curvature of a 55gal barrel, fine tune it with a five pound when I'm ready to bolt the barrel on. The plate fits between the center ribs of the barrel.