Hello builders. I am ready to buy a tig welder. A friend of mine suggested me an AC/DC tig for thin aluminum sheets. WHat difference the ac does? they are more expensive for sure. Which gas do you guys use for your welds on 6061? argon or argon,hydrogen,helion. Is that the correct combination for the T6? Any recomendations and knowledge will be very helpful. The tig I will buy is called IMPERIA 2…