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Switched to the 5/8" size for better gas coverage on thicker aluminum, and it’s made a real difference in weld quality. The fit on my 17 series torch was snug and secure right out of the box.

Finally found a gas lens kit that fits my 17 torch without adapters. The included collet body feels much more solid than the standard ones I've been using.

I was pleasantly surprised by how much more evenly the gas flowed through the large-diameter cup compared to my old setup. The kit includes four different sizes, so I found just the right one for my 26 series torch without any fuss. This thing feels sturdy and ready for heavy daily use.