He dives sidemount, so this may be why he's insisting on 2 separate transmitters. He also had trouble remembering the correct hose routing for doubles, which cast some doubt on how familiar he is with the setup. And tried to disassemble second stage from hose by cranking on the parts of the connection that are fused together. I don't want to derail this thread any further, so I'll start a second one to sanity check my setup. I think I might do AN/DP elsewhere....