that a few times while building these. Not sure how familiar you are with welding, but when the weld cools, it draws the metal. When these actually get TIG welded, there is going to be a good bit of stress around the welds because of this and cryo treating them will relieve these internal stresses quite a bit. I would imagine that this process would likely be very good for them, although I need to find some place that offers that service. Thanks!