Perry: I not sure what I said, my wife dosen't know what I said my children don't know what I said. My two donkeys understand me just fine LOL. I have an iron barrel full of the soup. My plus side is hooked up to the barrel and the piece to be cleaned is suspended with the help of a 2x4 with a hole in it so the rod attached to the piece being cleaned goes through the 2x4 clamped off with a pair of vice grips. I don't have any other metal in the barrel other than the piece being cleaned and the metal clamped to it holding it from touching the sides and bottom of barrel.
Preston, that sounds better and that'll work, HOWEVER, you are going to have the same problem that Michelle had when she done the same thing you are doing. As your setup works, it is eating away the barrel because the barrel is the donor piece, and so it will eat a hole in the barrel and your soup will become poop on the floor of wherever it is sitting. For that very reason you need a plastic barrel and then put the SS in and let it be the donor piece. Anyway, what you are doing will work, but it will only work without leaking until the process eats away the barrel.
I would say that eventually the big SS barrels that I sold folks will eat away and leak, however the SS is so thick and of good quality that it actually resists rust, like its supposed to anyway, so I don't know how long one will last. But unless your metal barrel is super thick it will not last long. Just giving you my thoughts. Good luck, the main thing is you got a system and if it is working that is 99.99%. The rest that people talk about on here are merely modifications to make it work faster, bigger, and better, but getting it working is the main thing. ;)