While trawling the web for solutions to my leaking XM problem I came across this site which I haven't seen mentioned before despite there being a lot of discussion here about Xantia return lines etc: Site web dédié à l'entretien et à la restauration du système hydraulique de la Xantia. (It's all in French so is less likely to be found in searches but could be translated if necessary.)
As well as being very detailed, the quality of the owner's work recreating junctions and joiners is quite amazing and he gives lots of details about dimensions and how to build metal replacements if you have the time and skill.
As well as being very detailed, the quality of the owner's work recreating junctions and joiners is quite amazing and he gives lots of details about dimensions and how to build metal replacements if you have the time and skill.