You can use regular bent tube hose ends without the swivel stems. The only thing in there is an O'Ring. Usually a lock wire retains the pieces together---sometimes a crimped section. But the stem swivels (rotates) on the stem and they will leak. Some more than others. And the more movement, the more the o'ring stresses, and/or is exposed to the fluids---i guess fuel in this case--and deterioration starts.
Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan