They are talking about the log but there is a way to get around it cracking. If you Make sure that the wall thickness is 1/8in or a little more then you should be good to do. And make sure that you have a professional TIG welder with a rep do it. Nothing against doing your own weld or for those people who did do it but I have heard stories both ways. But the person who pays the welder usually ends up with the better deal out of all of the storise I have heard. Other people may not think the same but this is what I have heard from people who have done it both ways.