Hey Sign::::::: If you call Miller welding and tell them the deal about the gas... I can't gaurntee anything, but I'll bet they'll take care of you. I opened a small welding shop a year and a half ago, and they have went above and beyond what I have ever expected them to, as a large co.
I had a 375 that I had a few isues with for the first year and never was really satisfied with after a year and a half Miller made my dealer a deal on a 625 for me to trade my 375 in on a 625 that I could not pass up.
I'm a customer for life! No matter what! they take care of there customers!
I spent 4 hrs on the phone one day with mike in there 251 division working out a problem that I thought was a problem with the machine. Come to find out it was the way I set the machine up to begin with.
I hope you call them and let them know your not happy because they are a customer service driven co.