Another quick build question, I didn't really find what I was looking for thru the search bar so I will just ask, are there pros or cons to the shape of the fire box? round vs square ive noticed them both ways and just wondered if one is better than the other? I can get my hands on plate steel much easier than large pipe for an offset firebox but if one happens to be better than the other I would rather build the better way rather than the cheaper way