A joystick at the helm would steer the boat from the dock, we'd been told. We pushed a button to start the engines and nudged the stick forward. The engines revved to 1,000 rpm and eased us into the tight access between docks. A twist of the stick pivoted the boat neatly in place, 90-degrees and -- well, this was fun. We idled into the lake, grabbed the running throttles to check top speed and overall handling -- which was also fun, quick and nimble -- but we wanted to play with Axius, the name MerCruiser gives the electronic steering mechanism that controls the stern drives with the flick of a joystick.