Aluminum fuel line works good as long as it clamped with a good rubber lined clamp and is not rubbing on anything. I used it once and where it passed thru the frame it touched and probably vibration and hitting bumps it rubbed thru and leaked. After that i changed to braided line.
This is true of any fuel line, just aluminum will probably rub thru quicker than steel or braided line.
my concern has been with alum lines, its a lot easier to turn a small localized fire in a nice big one, if alum fuel lines are in the flames. The work harden issue with alum is reduced by optimizing one's alum alloy choice, ie 5052, which may not be easy.
