Spot on mate, because the argon doesn't carry the arc well, it's wasted (as per my demo above).
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@GQtdauto, this are the photos of the MIG tip/tip holder/nozzle holder, close-up.
These are the photos of the fitting on the regulator that I had to swap over.
As you can see the original one(silver one) has no O ring.
I added pictures of the inside of the gas bottle fitting. It doesn't look like it's damaged.
And while were on bottles (which look fine), you only need to crack the bottle open, not 100% like you did in your video.
When on opening a bottle it's only ever 1/4 turn, 1/2 max if I'm feeling generous or bottle is getting empty..
The pressure these bottles are under you don't need much..
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It's getting there..http://www.nissanpatrol.com.au/forum...017/11/203.jpg