I had a 500 gallon propane tank given to me that had formerly been used for a volume tank for a air compressor. What I am thinking is that yhis is larger than I need so I am going to cut the dome off one end , cut out a three foot section reeled the dome end back . Then cap both ends of the 3 foot piece for the fb . Planning on building a reverse flow smoker. I know this mite be extra work but since i have more time than money trying to save a few bucks where I can. Any comments advice or suggestion are appreciated . The cc should be about 83 inches long with a diameter of 37 inches the fb 36 inches long by 37 inches in diameter. First time build and new to this site