Shoulda searched in Database where you first posted.
I carry a set of brass return fittings. As was already mentioned, the metal pieces have been reported to leak. Probably depends upon the manufacturer. I haven't tried any of my spares yet.
If you change an individual fitting I would consider using a hair blower or heat gun to make the hose easier to deal with. Not too much heat on the plastic though.
Some info here.
Fuel Return Line Leak Off O-ring Seals
Yes. I have not needed to do that though.So just one fitting can be changed?
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