My welds are only about an inch long ea. If I waited to see a cool tungsten I would have to triple the post when I have the 1/8" electrode 2" long at 250A. My recent project, building Aluminum Fireworks Pods, I've gone through 6 - 300ltr tanks! In retrospect, I should have Migged them, the Argon savings would have almost paid for the spool gun...

I don't think it was Me with the "homemade gas saver", but I Do use a Gas Lens system.