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This gauge is an essential part to all divers that use a "spare air" system. The gauge is accurate and fairly hard to read, a magnified or slightly larger gauge would make it perfect. I just dont understand why spare air doesnt make this a standard feature.
Do you really have time to swim over to your buddy for air if you are out. If your first stage regulator fails your octopus wont work. I considered a pony bottle with both a first and second stage regulator, but picked the 3.0 cf bottle because it was compact. seems to be high quality and it works fine