So, I'm going to take on the challenge of making a custom subframe for my '70 airhead. I've got the welding part down reasonably well...been practicing and getting critique from a neighbor that knows about such stuff. Next up is figuring out how I'm going to bend the pipe stock. I know that a proper shop has expensive bending machines, with the right mandrels and so forth. But what does the cheap home hacker garage have? What's the pennytech way of getting some basic bends into these pipes? For example, a 180* bend for the back end of the subframe... Home built rig? Cheap Harborfreight options...?