Nice Idea about the adapter. The home Depot sells one too that converts the 14-50 to a 5-15 for those who convert over to gas. Thought about buying it and asked the CSR about how it's wired. She had no clue and just walked away. I figured I could have bought it and reverse engineered it so see what goes where but it costs close to 60 bucks.

If I'm out and about I'll run it on 120v cus it's more readily available. Space is tight in the case as it is. I have a 4" grinder, gloves, brush, file, leads, mask and Rods in there. Everything I need for stick except helmet and maybe extension cord.

But now this is getting off topic. It's good that others know about the difference between the plugs and neutral locations cus if you didn't you'd have a higher chance of frying your welder.