Freddy Parr sells torches, sometimes second hand. I'm also swallowed up with an interest in aircraft, so I break towards the aircraft torches designed for welding. They can braze also, you probably need the long neck for the heavier brazing tasks, to keep the heat reasonable. It's just too much to pass up on the ability to do everything from heat treating knives to welding jewelry for the cost of the unit framebuilders are using. You can weld steel aluminum copper, stainless cast iron and so forth. The only disadvantage is that the Smith style has a round handle that is probably easier to keep in motion than the Tweako style. Now that the tweeko has propane heads, it's an even tougher choice.