This was my first project in the world of welding.
It didn't turn out too bad if I do say so myself.
(Click images to see larger ones)
I cut a 55 gallon drum at about a 40° angle and sat it in a frame I welded together using some old tube steel I found in a trash pile (I think the steel was from an old road sign)
Here you can see how I took two pieces of angle iron and bolted them together so that when you open the grill, the angle iron will hold the lid open.
By cutting inside of the rim, the lid will be lighter, and the grill will be able to retain more heat.
Added 2 thermometers for monitoring internal heat. As you can see, maintaining a low and slow 225 is really easy with proper vent control.
Success! I added a lid seal (from my local Green egg dealer) so now I can maintain a good 8-hour smoke only having to refuel the charcoal one time.
(I highly recommend B&B lump charcoal)