Long story short...last time I opened the valve on the tank for my MIG, the regulator decided to fail. It pegged the output pressure gauge, and sent enough pressure to pop the hose between the regulator and the welder. The welder is an ancient Miller Auto Arc 120. 1) Is there a chance that I damaged the valve inside the welder? (Or did the hose popping save me from that...) 2) Anything special about the hose? I'd like to replace it, no clue what I should replace it with though. 3) And finally...I think I'm in the market for a new regulator. There's about a dozen different styles out there, how do I make sure I get the right one? Thx!