I have a opportunity to but a 120gal liquid oxygen tank for $50. It is roughly 30" diameter and 42" in length. I would be building a reverse flow smoker with two racks and the top one removable with sausage hooks at the top. I searched and have come up empty on a liquid oxygen tank for use as a smoker. These tanks have been drained and I would appreciate any yay's or nay's on this idea. Would one use the same fill with water and soap method before cutting?