I have a project coming up that will require bending of "hoops" if you will. I will need to produce about a 4' diameter hoop out of 1/2 conduit. I am sure there is a device built for such a task, but is it something I can build? I would look it up and see, but I do not know what to call it. I have lathe, mill etc.. and a fearless attitude about building things. Any suggestions would be appreciated.