Going to be getting one or the other above listed welder/generators. On the TIG side of the welders it has the BC 250 going as low as 40 amps. The TB 275 DC will go as low as 20 amps. Do you long time TIG welders see a major issue with the BC 250 only going to 40 amps. I was told by the Miller sales rep that the 40 amp is the lowest the BC 250 can go, but the service rep told me you can get it to go lower than the 40???. The Trailblazer is about $500.00 more and I'm trying to keep the overall cost down if I can. Any help would be greatly welcomed.