I cut short lines to mark the bend locations.
Then I bend in my pipe Kinker with two pieces of angle iron welded to some plates to make a little hand brake for bending.
Then I just hammer or clamp in vise to fine tune the bend to match the profile.
Instead of trying to hit all the locations in one piece I just make it in sections so if any were wrong, I can cut/grind by hand or even recut just a section. But despite my best attempts to get it wrong, it fit great with minimal editing
