I like that "save-a-divetrip" kit. I usually carry an extra reg with me, and an extra hose, and an adapter, just in case...
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Don't get too hung up on the tiniest details - using or not using the 1/2" port is NOT what makes you DIR or non-DIR.jplacson:And if the rule on the 1/2" port is a flexible one or not...meaning, if you do carry a spare hose, are you still within the DIR guidelines.