Like john said to block the ends of the tube to keep in the argon is correct i cut discs and tape them on or cut plugs from soft wood and wedge in and will run a hole through one so i can fit in some gas hose i have a T or Y piece with another flow meter and i run the 2 flow meters off the one reg that way i can turn off the second one when not in use for purge work and it has a long hose with nothing on the end and i poke it through the cap end or wedge bung use a bit of masking tape to seal leaks and purge away .
I dont mind doing the weld jobs at home if i have the time and you have the beer for my time

and coin for consumables like gas and wire
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