Hi there I am new here but have had a bradley smoker for about 5 years. I have smoked duck, salmon, elk, deer and domestic animals. Favorite smoke for the most part is mesquite and then any combination of the same. I have retired from the airlines and use my smoker as often as I can. I have purchased a propane vessel that I want to convert to a smoker for a hobby not a job. The propane tank is 3.5' X 7 ' and had been previously a smoker. I don't think the previous version worked to good since it was in an auction and it was full of ____. The racks were not removable and thus very hard to clean, thus I had the racks removed and will install my own. I was wondering if any one has used grocery cart metal for their racks and if there are any cautions about their use? The previous fire box was a smaller propane tank with it's end cut off and welded to the end about 1/2 ways up. I don't like this design because it takes alot of fire to heat all the way through to the stack on the other end. I propose a fire box underneath with it's length almost the entire length so I can have heat to the whole tank. Am I correct? This tank is not on wheels Yet so it is not portable. Very heavy tank. it is made of 1/2 steel. Any ideas I would sure appreciate the help. I I decided to add this photo after all so you have a visual of what I have to work with. Thanks hope to hear some suggestions.