I rarely go to HF, mainly because it smells so bad in the place, and I figure it's mostly recycled coke cans in the products. I once had a tool break and a broken end mill was in the casting, so it made it clear where most of that stuff comes from. It was a slight disappointment when I first opened the Nova pedal as it had that Chinesium smell to it, much worse than anything inside the welder box or packing...but it must be that rubber on the cord, where the machines have a harder plastic on the power cord.
My $0.02 FWIW, go to your local welding shop as they will most likely carry some CK tungsten, I have no idea where it is made, but it is what most people use. That midwest stuff was hanging on the wall of my LWS as well, so I'm sure it's fine. I don't know about HF tungsten, I avoid going in the place unless I need to.
Alan





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