So I finally went to Home Depot and picked up some flexible ducting (non plastic) and some aluminum elbows. I've been looking high and low for an unpainted mailbox but have come up empty handed. Where are you guys finding these? Or is everyone just using the powder coated mailbox with fingers crossed that the amnps doesn't catch fire? My husband found a heavy duty aluminum pot with a lid that he thought would work well in lieu of a mailbox but I don't feel great about a fire starting inside of that either. I like the popcorn tin solution but those also have a coating on the inside. Am I worrying too much? I just don't want to ruin a nice piece of meat with chemical smoke if anything were to catch on fire.