I know this has been a while but are those conical seals still holding. I just developed a leak from the female end of my return line out of the regulator. It’s coming out of the hole on the female swivel with those little ball bearings. Trying to fix without have to cut the line since it runs from there clear to my tank it may be to short if I cut it.
thats where al my fragola crap leaked. It's either not quite tight or a bad fitting.
I've got a few connections with conical seals for a few years now and no leaks. the PTFE hose might take a little doing to clean up the mesh weave but I have successfully replaced fittings on PTFE hose without having to cut it