I'm gutting my brake lines, and upgrading (at least I hope it's an upgrade) to F350 dual diaphragm booster, and a Wilwood adjustable proportioning valve. Anyway, I've got to make several brake lines and I'm not happy with most benders, so I made a few mandrels. The small multi stepped one works really well on small radius bends. And I made two different size coil mandrels that work even better than I had hoped. They bend steel and nickel/copper lines really well with no collapsing.

 

That is close to the one I have it just does not make real tight bends.
http://shop.advanceautoparts.com/p/l...E&gclsrc=aw.ds

I have had it since the late 70's.
Dave ----

 

Amazing. My friend has one just like it. He also said he's had it since 70's. I tried it and like it, but it doesn't do small bends or coils.