Well finally got started on my build. Using a 100# propane tank, removed valve let sit upside down for a few weeks, then washed out with soapy water Good to Go. Cut hole for chimney (3.5') , and cutting out door which will be 13" x 31". This will be my spring project, no real rush, have to pick up some steel next time I am in town. Will post pic later today. Any comments along the way would be appreciated.