Cunifer is used for brake pipes (typically 3/16 ~ 5mm outer diam),
working pressure 100 bar, and is now replacing steel brake pipes. It
can be bent with a plumber's minibender. It seems Tom Skelton found
10 mm cunifer pipe is too stiff for a minibender.
I think Smiffy has repaired his wheel arch section using standard
plumber's 10 mm minibore copper pipe and compression fittings. 10 mm
minibore copper pipe is used in pressurised central heating systems
where the pressure is up to 3 bar and can be bent easily with a
minibender. So this seems the way to go for the rest of the fuel
piping if it has to be replaced. believe ptfe tape should not be
used anywhere and olives should be unlubricated.
TomH