I am so sick of having fuel leaks

Lars said

There isn't any flare at all where it is leaking IIRC.

Click to expand...

That's the problem. The double flare needs to seat against the base of the fitting. No flare guarantees a leak. This isn't the factory tube, I presume? A double flare tube is cheap, Harbor Freight sells 'em under ten bucks.
http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=40878