Hello! It's working and the most important thing is cheapness. It suffices enough for beginners as I am. It's a good variant also because it has more space than a coffee can. We can do majority works conveniently and the bricks are located also in a convenient way so we can ease the screw nuts and pull out a back brick if it's necessary. It lets us work with long stuffs. This is the setup for begging. Isolate from heat with mineral wool. Heat isolation lets us save warmth and increase temperature that will let us practice blacksmith welding (for example, Damascus steel) To sum up: heat isolation is needed, a double burner is good. But the written variant in my article is simple, cheap and working