A friend and neighbor of mine is co-owner of Northern Wings; they remanufacture aircraft parts. He is, and has a crew of professional welders and engineers. He does any welding I need done either free or at very minimal cost if he has one of his men do it. They did the breech plug wrench for five bucks. If I need welding done on a barrel, I'd just copy the relevant FAQs and give them to him with the barrel. The easy way out!