When I bottom out the plug, the position is just about to the "-" position, but it's not quite there. So I have to back it out almost a half turn to get to my first "-" setting, and then I adjusted the settings from that point when I was shooting. That was my interpretation of the directions, but correct me if I am wrong.
What I was saying before is that I was going to back it out another half turn from there, so maybe that will open it up slightly.