[Outwest34au]

Thanks Rob, I have some ideas on how to minimise the risk of damage and will look at them when I get a day off.
The double tube on LPG systems is to help vent the gas away from an enclosed or passenger compartment in the event of a leak or rupture. If yours was in a steel tube that was protection maximus. Looking at the video I have of several XA's being torched to test the venting methods used back then (70 - 80) you would reckon a government department had designed them with the grim reaper as chair person and bankroller combined.