Use PTFE hose wherever you need "flex" if you don't like fuel smell in your garage.
Yes it's slightly harder to put together because of the tight tolerances. If you don't have the tools -- see if your local hydraulic hose shop will do it for you. Just use tape and mark where you need it cut and a line to index the fitting if that's what you need.
Many of the hoses out there allow the "gas smell" thru the hose... which has a lot to do with todays fuel blends.
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