Hi, I made a metal cylinder that is the SAME size as my 400g propane cylinder (picture: https://2ecffd01e1ab3e9383f0-07db7b9624bbdf022e3b5395236d5cf8.ssl.cf4.rackcdn.com/Product-800x800/7a66c8cb-d697-4680-9321-fcb73ede75c9.jpg). I want to transfer ALL (or almost all) of the propane from the...