Was at home depot and noticed the drip pans for under water heaters. Was thinking about seeing if something like that would fit inside a drum. Problem with that is I believe they are galvanized. You could strip the galvanized coating with muratic acid but would it be worth it? The last charcoal basket I made was for Single Fin. I think I liked it best. Next time I plan on getting a charcoal grate from a weber(grate coals sit on not grill) They have them at most places that sell weber replacement parts. I took 4 1/2" diameter bolts and sandwiched grate between double nuts and washers. This gave a great way of standing it off bottom without restricting air flow or trapping ash. I tack welded a ring on top to hold charcoal. If you don't have a welder you could use hog rings or tabs and screws.
So far as setting on deck make sure you stand it off. It will get hot on bottom. I will try and locate pics. If you want me to send the powerpoint presentation I made PM me your email and I will send it to you.
Low and Slow.....
The Prontologist is in...
Ok let's see your Butt!