I have read this whole thread and everyones comments. Scott, as you know, I sold you that kickass barrel you're using. Glad its still doing you good.
Charles, I have NEVER, NEVER, NEVER, NEVER, worn out a piece of SS, not even ate out a hole in a piece. And I have a drum like Scott, but don't even use it. I use a large plastic barrel with sheets of SS in it.
And Charles, do not go out of your way to get something with holes. If you think about it, with holes, you got less SS, and if less is good, then use a real small piece of SS. And Charles, your idea of putting the surround sound in your barrel and a piece at the bottom, that will work fine.
And go to your local recycling center to get sheets of SS, its cheap. I have spent 12.00 (twelve dollars) on SS. When I hear folks say they want to buy a big piece of SS, thats good, if you want to, then do that, but you don't need to. And there are all kinds of places to get what Michelle is talking about.
Go to a restaurant equipment auction and I guarantee you, that you can find something that will work, if you want a tub like Michelle and Scott are talking about here.
Just some of my thoughts, Charles no holes. And when I use the two opposing sheets of SS, when one side gets cruddy, I turn it around and I got a whole new sheet in about 30 seconds, when both sides are nasty, I just pick them up, hit them a few licks and promises with a SS chore boy, and I am good for 300 more pieces, piece of cake. ;)