I have a Sigg Firejet which gave me great service in 1994 when I rode around parts of India on a motorcycle with my wife. Now with a teenage son that I'd like to take camping and hiking I'd like to resurrect this stove.I had to make up a washer to hold the leather cup in place for the pump and it works fine now. However I read that the rubber in the fuel line will likely have reached a point where it can crack and leak and even create a fireball, not the sort of thing I want happening on a camping trip. My fuel line was also heavily kinked, likely stressed internally and also likely restricted too as a result.The consensus seems to be that unless I can source the rare and hard to find replacement fuel line ( which will be old stock anyway and likely to suffer from age too) I should keep the stove as some sort of ornament. After a bit of frustrating headscratching and a botched attempt to separate the pump side brass connection into two pieces ( when in fact it is seemingly just one piece) which resulted in minor damage to the threads which doesn't affect functionality I have now separated the connectors from the fuel line. I used a screwdriver to prise the ferrules apart from the connectors, it was a relatively simple procedure. My next stage is source braided fuel line with internal diameter of 2 mm. I'll keep you posted on how I fare in getting that fuel line.