Lost in translation. Soldering iron. You can also use a knife as long as you are careful not to cut into the nipple as you describe.I have purchased the fuel injector hose & connector kit (hose, bushing, and clamps); I have two questions:
The workshop manual says to remove the injectors from the rail by cutting the pipe with a welder. I'm not trying to be obtuse, but it looks like they're cutting the hose with a soldering gun. Can you just cut the hose with shears, then slit the pieces lengthwise to remove them from the rail and injector? What's the preferred method?
Also the current injector hoses are approximately 55mm long; the new ones in the kit are about 43mm. Is this going to cause any problems?
43mm seems short. I just looked at mine (which I cut to length myself from bulk hose), and they are close to the 55mm length of your old ones.