Here's a mini-bender I made that I keep in my mobile unit. It's made from a piece of 3"W X 1/4"T "C" channel with a vise lug welded to the bottom. I made it so I can slide the inner vertical post approx. 1" to adj. for thickness. It will also accomodate 4"W flat stock & I have bent 1/2" solid square with the O/A persuader. There are xtra tubes to slide over the fixed tubes to increase diameter. These are easy projects to make & will come in handy. Pics show the simpleness & ease to make.