The axius is great. It took me about 20 mins or so to get use to it. When you first start using the axius, you automatically start reaching for the throttles/steering due to old habits are hard to break. But once you trust it and get use to how sensitive the joy stick is, you can truly make the boat do anything you want. I am amazed at the technology of it. I was practicing at the fuel dock the other day while it was closed. I was making the boat crab sideways and then when I got close to fuel dock, a little twist of the knob and bow comes in gently so the crew can grab the line, then twist the knob the other way, the stern comes gently in. When your done, simply press the joy stick sideways to the right and no need for a push off, even against current.
Still looking for a thought about what this key (I have four of them with number 831) is for. Anyone?