[Dragonharper]

Anonther thing to consider: I get my hoses, regulators, and other misc. Stuff at my local welding supply shop. That way I'm building a relationship with someone that I can come to trust. It's not always about the $$$. It's good to have someone who can answer questions and provide quick help when you need it. The difference in price on the hoses and regulators will be eaten up in shipping and you will most likely get better quality when you shop loca. Oh, and you don't need heavy duty regulators, heavy duty refers more to the pressure needed to "cut" steel than how hard you plan to use them. The check valves are to keep one gase from backing up into the other's tank. Mostly needed on premix or welding torches. The flash back arrestores are a good safety measure, they keep flame from traveling back the hoses and into the regulator/tank. Again, mostly needed for premix torches but there accidents that can happen in a hot shop that can cause this as well.