for the best crisp low amp arc starts, use the smallest diameter tungsten electrode that is practical.( if all you have is a 3/32" then a needle sharp point with a long sharp taper helps)
When filler metal is required, use the smallest diameter that is practical. ( you can also use a piece of er70 small diameter mig wire)
aluminum blocks for chill bars can help a lot in removing heat and preventing distortion
happiness is a tight arc length
keep your tungsten sharp...if you dip it, resharpen
pulse settings are shown in several of these videos on tig welding thin carbon steel
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