I ran aluminum 1/2" the length of my car and never had a problem. Mine wasn't flared as I used conical fittings. I never experienced a leak. A couple things come to mind. If you are not running teflon lined hose, how do you feel it's safer? Those things spring leaks left and right due to detioration. I'd rather have a fuel leak due to running over debris than detioration. At least it's not a surprise. Next, debris is just as likely to take out a hose as it is a hard line. Lastly, hoses are known for smelling up your garage.
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Todd
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