Here we are using wood blocks so we don't mar the tube as we give it a few tweaks. Some bends (called "bend on a bend" in the industry) can only be made with dedicated tooling as you have to have a certain amount of tube to grip on to so you can bend it. In such instances (only the tops of the doors in our case, so a $7,000 die is not justifiable) we do the time honored tube tweaking with blocks of wood.