Mermites - ammo cans - Pelican cases, lots of people have started with those, and modded & bolted 'em up to a rack. But has anybody MADE their own cans? Sheet aluminum? Welded or riveted? Shop-made or done 'em yourself? Pictures? Links? Instructions? Warnings? Who's got the most ultimately-unique, custom, home-made, one-off panniers on this board?