Jesse: cedar? Wow! Never thought of that! Really interesting idea. And yes, I will definitely wear eye protection.
Dog: Glad to hear cork isn't all bad; I'd still like to at least give it a shot.
Jim: I don't have access to shell casings, but I definitely like the idea, along with the rest of your tips!
RHenn: Thanks for the foam info; I will check them out.
Great info, folks! This is really interesting reading!