Once you've mastered the technique to form a decent looking double flare.....don't dispair if you have some leaks.
It may be common sense but when you snug down the B-nut be sure to wiggle the line so that it seats fully. If you don't use that little "wiggle" of the line, you can crank down and the fitting may still leak.
I like to leave off all the line to frame clamps and after I have everything gently snugged down so I have the b-nuts started.....then go throught the system and wiggle the lines until they are seated and the nuts tight.
With a good double flare and the proper technique for the final tightening your system will be free of leaks.
Dave
