Cleaning the fittings and pipe is not a fuel gas issue though both are important, more an Oxygen under pressure issue. A local Dentist and his plumber were never found after the plumber connected the oxygen to oil covered pipe fittings.
The remote tanks thing may be a good idea it is not a do it yourself kind of thing. I won't use a used welding hose, I've seen some of those in storage with "whatever" covering them and the ends exposed.
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Doug
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