Gonna buy a proper Mig welder, seen loadsa conflicting info about gas mixes, so which is the standard, mild steel mainly with stainless occasionally, also why doesn't everyone buy tig only if it's better weld wise, I know it's slower and harder to learn but I'm very new to this welding lark! Also, do you have to gas purge all the time if welding stainless tube? I'd seen a YouTube vid and it was treated as a given in the vid? Only been a month welding and been on forum 2 days, am a very quick learner mind you so ally tig coming soon! Not!