I am ready to purchase my first mig wire feed welder. I think I will get a welder that I can use with flux core wire to start with, and buy the guages and bottle so I can switch over to gas if I want. I am only familiar with welding on a 110v machine using a gas backfill. I have never used the flux core wire without the use of gas. One of the questions I want info on is what a 220v machine will offer compared to 110v's. I mostly weld on car projects, sheet metal ect, but would like to be able to weld frame metal or other heavy guage metal sometimes. Any info appreciated! Thanks, Darren...