SundownIII: the 1/8 or 1/4 was the thickness of the tube. It was either 2x2x1/8 or 2x3x1/4, sorry for the mix up. I am looking at the invoices from my LWS and the price for 100% argon is $75.00 and 75%argon/25%helium is $98.00. So the difference is $2300 instead of $15.00, shame on me. Just because one company doesn't use this mix means it has no benefits? seems like an odd argument to me. I can tell you right now I run the mix at right around 10cfh, and that is with a gas lens if you missed that in my origional response, and I don't have any contamination problems. Different strokes for different folks. I come on this board to learn as much as I can and try to help out others in the same way. I don't claim to have all the answers I was just offering up some information I thought was helpful, by no means do you have to listen to it.