[dsraven]

those sheet metal clamps work great. they also space the 2 parts well for a good weld. I have a bunch of them and used nearly all the other day on a project. the cleco's are also invaluable, especially if working by yourself. they are like another hand. if you can hold the part up long enough to get a cleco in the predrilled hole then it will help hold the part in place while you get another cleco installed, or, they hold things in place while you fit other areas on some of those parts with more than one piece/angle to work with. some good strong magnets are also invaluable when you are working by yourself. great for panel alignment etc. not so great to weld next to. they disrupt the mig weld and cause porosity. a little messy tack is better, with the panels lined up correctly, than a good tack you gotta grind off because the parts aren't fit well. the little messy tack can be ground off and redone when the magnet is removed and the panel is properly tacked elsewhere.